RainCAD – Landscape and Irrigation Design Software For Professionals #landscape #design #software, #irrigation #design #software, #landscape #design, #irrigation #design, #landscape #software, #irrigation #software, #landscape, #irrigation, #design, #software, #program, #sprinkler, #system, #sprinkler #design #software, #sprinkler #system #design, #landscape #imaging, #design #imaging, #image, #raincad, #land #illustrator, #pro #contractor #studio, #irricalc, #software #republic, #autocad, #designcad, #cad, #computer, #automatic, #sprinkler, #layout, #plant, #symbols, #symbol, #legend, #hydraulic, #calculations, #distribution, #uniformity, #analysis, #area, #volume, #material, #takeoff, #list, #estimate, #estimating, #pricing, #job #costing, #pipe, #size, #piping, #sizing, #mainline, #plantings, #plant #database, #plant #material, #plant #search, #dwg, #dxf, #scan, #scanning, #digital #camera, #rendering, #photo, #lighting, #night, #accent, #lighting, #drainage, #irrigation #scheduling, #water #scheduling, #water, #schedule, #water #management, #free, #trial, #demonstration, #samples, #green #industry, #architects, #consultants, #contractors, #desktop, #laptop, #pc


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Learn more

The RainCAD 13 BricsCAD Edition runs seamlessly inside of your existing license of BricsCAD Pro or Platinum 13.2 from Bricsys . The combination of these two programs provides the power and speed without the additional expense of AutoCAD . The software saves drawings in an AutoCAD DWG format eliminating the translation process. The software creates quality landscape and irrigation designs to help separate your company from the competition. In addition, the software assists the user in becoming more precise in the material takeoff and estimating process.

System Type:

  • Integrates with your existing copy of BricsCAD Pro or Platinum 13.2 from Bricsys
    ( BricsCAD is not included with RainCAD and must be purchased separately )
    Designer Type:
  • Novice to advanced CAD users
  • Users that need a cost effective yet robust design system without the additional expense of AutoCAD
    Project Types:
  • Small to large residential design projects
  • Small to large commercial, parks and recreation, or golf course irrigation design projects


    Learn more

    The RainCAD AutoCAD Edition runs seamlessly within your existing license of AutoCAD . RainCAD provides all of the design tools necessary to create fast and accurate irrigation designs, distribution analysis, hydraulic calculations and more. The superior landscape design features help the user to create landscape designs that are more professional in appearance without sacrificing speed. The software quickly creates symbol legends, material lists, installation estimates, and more.

    System Type:

  • RainCAD 2013 – integrates with your existing copy of AutoCAD 2013 (64-bit only).
  • RainCAD 2012 – integrates with your existing copy of AutoCAD 2012 (64-bit only).
  • RainCAD 2011 – integrates with your existing copy of AutoCAD 2011 (64-bit only).
  • RainCAD 5.5 – integrates with your existing copy of AutoCAD 2007, 2008, 2009 or 2010 (32-bit or 64-bit).
    ( AutoCAD is not included with RainCAD and must be purchased separately )
    Designer Type:
  • Advanced users with a working knowledge of AutoCAD
  • Designers who regularly transfer DWG files with Architects, Engineers or other AutoCAD users
    Project Types:
  • Small to large residential design projects
  • Small to large commercial, parks and recreation, or golf course irrigation design projects

    Sample RainCAD Designs


    Russ Prophit, CID, CIC, CLIA
    Precise Irrigation Design & Consulting

    Copyright 2014 Software Republic, L.L.P. All rights reserved.


  • Identify when a SQL Server database was restored, the source and backup date, solarwinds backup database.#Solarwinds #backup #database


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    Identify when a SQL Server database was restored, the source and backup date

    Problem

    After restoring a database your users will typically run some queries to verify the data is as expected. However, there are times when your users may question whether the restore was done using the correct backup file. In this tip I will show you how you can identify the file(s) that was used for the restore, when the backup actually occured and when the database was restored.

    Solution

    The restore information is readily available inside the msdb database, making the solution as easy as a few lines of T-SQL.

    When I ask people about how they verify their database restores I often get back a response that includes something similar to the following code:

    The above command simply returns this message when successful: The backup set on file 1 is valid. Is that really useful for your end user that is complaining that the data is not correct? Chances are their complaint is not about if the backup set was valid, but more specifically it is about your selection of the backup file, or the timing of the backup itself.

    If the backup was done at the wrong time, or if you restored from the wrong backup file, then the end user may be seeing exactly that problem while reviewing the data. So, how do you provide some proof that you did the restore from the correct backup file? The following script can give you this information.

    The script will return the following result set:

    Here is a screenshot of a sample result set returned by the script.

    Solarwinds backup database

    Next Steps
    • Take the above code and execute against your instance.
    • Keep this script handy next time you want to know when a database was restored, what file it came from and when the backup actually occurred
    • Take a look at these other Backup and Recovery tips

    Solarwinds backup database

    Solarwinds backup database

    About the author

    Excellent code. Thank you

    We do use a lot of DMV’s but the point is when to use each one of them aptly.. this post is perfect under the naming ” How to find the last_restored_file on secondary server in Log Shipping when Log Shipping monitor shows NULL values”..

    I did googled a lot but when specified how to sync up the values with probable causes , but this made me sure that we have an alternate way to find..

    Gooood job Thomas.

    Thank you for the Tip, it is really helpful. I have been using this long time, just today getting confused. I am restoring a db form the backup at the network share and using the UNC path. The restore is successful. But when used the query from this article, it is not showing the network share path instead keep showing the path where the old backups are in the local disk.

    So i removed the old backup from the local disk and run the restore job (SQLCMD) and after restore still i am seeing the backup from the local disk. But i am sure it is picking up the backup file from the network share, i confirmed this by removing the backup file from the network share to see if the job fails.

    So my question to gurus out there, why the query in this aritcle is not giving me right info when i used the network share for backup file.


    How to restore and recover an Oracle database to a – Point in Time – using an on-line backup #recover #database #until #time


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    How to restore and recover an Oracle database to a ‘Point in Time’ using an on-line backup

    How to restore and recover an Oracle database to a ‘Point in Time’ using an on-line backup

    Solution

    When restoring and recovering an Oracle database damaged by a user error or process failure, a very specific procedure must be followed.

    As an on-line backup of an open Oracle database is inconsistent or fuzzy, it is necessary to perform “Media Recovery” after physically restoring the lost data to disk in order to recover the consistency and relationship within the database at the time before the error occurred.

    Before the data and the database can be recovered and made consistent, all the backed up data files must be physically restored to disk. This restore must be performed from the MOST RECENT complete database backup set taken before the error or process failure occurred, and it must contain ALL the database data files including the control file and archived log files.

    The physical restore must be configured to “Restore over existing files”. If the database hasn’t already been put offline by the RDBMS start Server Manager. connect as i nternal and shut down the database with the abort option.
    Note. With the release of Oracle Database Server 9i . Server Manager and internal are no longer supported. Use SQL*Plus and connect sys as sysdba. See the Related Documents section at the bottom of this TechNote for this procedure.

    Restore all the data files contained in the backup to their original location

    After the data files have been restored to disk, they are inconsistent and to make the database consistent it must be recovered. The recover database command will start an Oracle process which will apply ( roll forward ) all transactions stored in the restored archived logs necessary to make the database consistent again . The recovery process must run up to a point that corresponds with the time just before the error occurred after which the log sequence must be reset to prevent any further system changes from being applied to the database. It is therefore necessary to use the recover until command. This will recover the database by applying archived transaction logs up until a point specified in the command. The recover database until command supports three clauses that will abort the recovery process at a specified point:

    • recover database until cancel recovers the database applying one log file at a time until the recovery process is manually canceled
    • recover database until time 'YYYY-MM-DD:HH24:MI:SS' recovers the database to a specified point in time
    • recover database until change scn recovers the database to a specified system change number ( SCN)

    The following example demonstrates using the recover database until command with the cancel clause.

    In the alert log ( SID ALRT.LOG, ) locate and note down the log sequence number of the last log archived before the error occurred. This will be needed to terminate the recovery at the desired point.

    Restart the database to a mounted but not open state:

    With the database mounted, run the recover database until cancel command from svrmgr:

    svrmgr: recover database until cancel;

    Before Oracle applies each archived log sequence, it will return a message similar to the following suggesting an archived log to apply and allowing the operator to either continue or cancel the recovery:

    ORA-00279: Change 36579 generated at time/date needed for thread 1

    ORA-00289: Suggestion. \Oracle_Home\Oradata\ SID \%SID%T00036579.ARC

    Press Return until the archived log sequence determined by examining the alert log ( SID ALRT LOG) is reached, at which point type cancel to stop further recovery. Oracle will return the following message:

    Media recovery canceled.

    Restart the database with the resetlogs clause. This is necessary in order to synchronize the log sequence up to the point of recovery and to prevent any further system changes made after that point to be applied. The following command will restart the database and reset the logs:

    svrmgr alter database open resetlogs;

    The database is now recovered. Because the redo log sequence has been reset, it is vital to immediately take a fresh full database backup.


    Strict Transport Security in MVC: Implementing RequireHstsAttribute – DZone Security #programming, #software #development, #devops, #java, #agile, #web, #iot, #database, #mobile, #big #data, #cloudsecurity,https,asp.net #core,secure #connection


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    Strict Transport Security in ASP.NET MVC: Implementing RequireHstsAttribute

    Strict Transport Security in ASP.NET MVC: Implementing RequireHstsAttribute

    Discover how to protect your applications from known and unknown vulnerabilities.

    HTTPS is the core mechanism for accessing web resources in a secure way. One of the limitations of HTTPS is the fact that the user can manually provide a URL which doesn’t contain the proper schema. In most cases, this will result in the application sending a redirect response which will tell the browser to re-request the resource using HTTPS. Unfortunately, this redirect creates a risk of a Man-in-the-Middle attack. Strict Transport Security is a security enhancement which allows web applications to inform browsers that they should always use HTTPS when accessing a given domain.

    Strict Transport Security defines Strict-Transport-Security header with two directives: required max-age and optional includeSubDomains. From the moment the browser receives the Strict-Transport-Security header, it should consider the host as a Known HSTS Host for the number of seconds specified in the max-age directive. Being a Known HSTS Host means that the browser should always use HTTPS for communication. In the initially described scenario (user providing HTTP schema or no schema at all), the browser should cancel the initial request by itself and change the schema to HTTPS. Specifying the includeSubDomains directive means that a given rule applies also to all subdomains of the current domain.

    In order to implement this behavior in an ASP.NET MVC application, we need to fulfill two requirements: issue a redirect when a request is being made with HTTP, and send the header when a request is being made with HTTPS. The first behavior is already available through RequireHttpsAttribute so we can inherit it – we just need to add the second.

    We can now use this attribute, for example, by adding it to our global filters collection.

    From this moment, our application will be enforcing HSTS. But the initial problem still has not been fully resolved – there is still that one redirect which can happen if the application is not accessed over HTTPS the first time. This is why HSTS Preload List has been created. This service allows for submitting domains which should be hardcoded, as Known HSTS Hosts, in the browsers – this removes the risk of that one potential redirect. The service is hosted by Google, but all major browsers vendors have stated that they will be using the submitted list of domains.

    If one wants to include his/her application on the HSTS Preload List, after submitting the domain additional steps needs to be taken. The application must confirm the submission by including preload directive in the Strict-Transport-Security header and fulfill some additional criteria:

    • Be HTTPS only and serve all subdomains over HTTPS.
    • The value of max-age directive must be at least eighteen weeks.
    • The includeSubdomains directive must be present.

    Some small adjustments to our attribute are needed in order to handle this additional scenario.

    Now we have full HSTS support with preloading in an easy to use attribute just waiting to be used in your application. You can find cleaned up source code here .


    Oracle Data Mining #database #mining #tools


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    Oracle Data
    Mining

    Scalable in-database predictive analytics

    Overview

    Oracle Data Mining (ODM), a component of the Oracle Advanced Analytics Database Option, provides powerful data mining algorithms that enable data analytsts to discover insights, make predictions and leverage their Oracle data and investment. With ODM, you can build and apply predictive models inside the Oracle Database to help you predict customer behavior, target your best customers, develop customer profiles, identify cross-selling opportunties and detect anomalies and potential fraud.

    Algorithms are implemented as SQL functions and leverage the strengths of the Oracle Database. The SQL data mining functions can mine data tables and views, star schema data including transactional data, aggregations, unstructured data i.e. CLOB data type (using Oracle Text to extract tokens) and spatial data. Oracle Advanced Analytics SQL data mining functions take full advantage of database parallelism for model build and model apply and honor all data and user privileges and security schemes. Predictive models can be included in SQL queries, BI dashboards and embedded in real-time applications.

    Oracle Data Miner GUI

    Oracle Data Miner GUI. an extension to Oracle SQL Developer, enables data analysts, business analysts and data scientists to work directly with data inside the database using the graphical drag and drop workflow and component pallet. Oracle Data Miner work flows capture and document the user’s analytical methodology and can be saved and shared with others to automate analytical methodologies. Oracle Data Miner can generate SQL and PL/SQL scripts for model automation, scheduling and deployment throughout the enterprise.

    Oracle Data Miner creates predictive models that application developers can integrate into applications to automate the discovery and distribution of new business intelligence-predictions, patterns and discoveries throughout the enterprise.

    Technical Information


    Human resources database software #human #resources #database #software


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    UConn Logo

    Smoking Cessation Resources and Programs for Employees

    Quitting smoking is very hard to do. Yet if you smoke, you know that quitting is the best thing you can do for your health. According to the State of Connecticut’s “Kick Ash” Campaign,

    • Smoking takes an average of 14 years off your life;
    • 1 of every 5 deaths in America is caused by smoking;
    • Smoking-related illness costs Americans more than $300 billion per year

    There are many available resources for those employees and students that would like to take the next step and quit smoking. Information regarding available resources is available on the Department of Human Resources website. Information regarding the University’s Smoking Policy as well as guidelines for supervisors and employees and frequently asked questions is also available on this website.

    • Americans with Disabilities Act (ADA) Compliance Accommodations
    • Employee Self Service (CORE-CT)
    • Learn about State of CT Defined Contribution Plans (403(b) and 457)
    • Promotion, Tenure Reappointment Information
    • View Professional job classification salary information (UCPEA)
    • Inform HR about a “Life Event” or Workplace Injury you have experienced
    • Reclassification information and form for non-teaching professionals
    • Request a leave of absence
    • Apply for a tuition waiver or reimbursement

    • Core-CT Implementation Project Readiness Council Members
    • Faculty Staff Labor Relations
    • Higher Education Opportunity Act (HEOA)
    • Hotel Development at UConn
    • HR University Policies
    • Payroll Office
    • Personnel File Contents (Official) Frequently Asked Questions
    • University Organizational Charts

    Access Password Recovery #lost,forgotten, #forgot,ms #access,database,user,password,recovery, #reveal,crack,decryption,break,tool


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    LastBit Access Password Recovery

    Did you lost or forgot Access password?
    Try our FREE Access Password Demo to reveal your forgotten password.

    1) All versions of MS Access (from 2.0 through 2010) are supported.
    2) Database passwords for old Access databases (2003 and earlier) can be revealed instantly.
    3) Guaranteed Password Recovery Service for Access 2007
    4) Access 2010 Password Recovery Service
    5) Fast and optimized password decryption.
    6) Easy to use interface! No complicated options: just “run it and get it” approach.
    7) Full install/uninstall support.

    Supported File Types:

    Benefits:

    • Unlimited password length.
    • Guaranteed recovery for one document.
    • 1-year free upgrade.
    • 30 days money back guarantee.
    • Free support.
    • The DEMO version is able to recover short passwords only (up to 3 characters long).
    • Guaranteed Recovery Service for Access 2007 is available for registered users only.

    Password Breaking in Access

    MS Access uses the underlying Jet Database Engine. Using Access Password, you can reveal passwords for any Jet databases, not only Access databases.

    Note that the security model in MS Access is quite complex (although it is insecure). There are two different password types: user passwords and database passwords. Read this article for more information on Access password types. Note that database passwords were introduced in Access 95. MS Access v2.0 does not support database passwords. In MS Access 2007, the security model has been redesigned; database security has been improved, and user passwords have been removed at all. You can find more information on password types in MS Access in this article .

    Database passwords for old Access databases (2003 and earlier) can be recovered instantly. To recover Access 2007 passwords, you have to use the universal password recovery methods. such as Brute Force Attack and Dictionary Attack. This may take a long time if the password is long and complex. Fortunately, we offer a unique Guaranteed Access 2007 Password Recovery Service. You can recover any password-protected Access 2007 database within 48 hours – regardless of the password length (databases created with earlier versions of Access can be recovered instantly). You can find further information on Guaranteed Access 2007 Password Recovery Service here. In Access 2010 password protection has been redesigned once again. Now Access 2010 uses the same password protection scheme as do other Office applications, such as Word, Excel or OneNote. This password protection scheme is very hard to break; Access 2010 password recovery is an extremely challenging task. Find more information here .

    User passwords are stored in a so-called system database (.mda (old Access 2.0) or .mdw (modern versions) file).

    IMPORTANT NOTE: the system database is required to crack a user password. If the system database is lost, there is no way to recover user passwords. If your system database is lost, please contact us for further information). To recover a database password, select the database itself (.mdb or .mde file). To recover user passwords, select the system database (.mda or .mdw file).

    Access Password can automatically find the currently registered system database. Note that it is very important to use the correct system database. Often password problems with Access databases are caused by using an improper system database.

    Note: We recover lost or forgotten passwords to Access password-protected files, but if your file is corrupted or damaged you can use use special data recovery tools. more information .

    VBA Password

    • Access Password does not recover passwords to VBA Modules in Access databases. If you need to recover such a password, use our VBA Password

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    • All you ever need to fix your password problems in MS Office.

    OctoPASS – Distributed Password Recovery System!

    • Multiple servers working together to attack your password.
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    BUY NOW
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    Broken databases If a database is broken, Access may erroneously ask for a password. There is no chance to recover such database with any password recovery tool. Access databases often get broken due to a horrible bug made by Microsoft in Office XP. This bug is confirmed (and fixed in the later releases) by Microsoft, more information can be found here. There is a well-known auto-replace feature in MS Word, for example, Word replaces a (c) sequence with a single copyright character. In all databases broken because of this bug, the reverse replacement was performed. The 0a9h byte is replaced with a (c) sequence (ASCII 0a9h is a copyright symbol), 0aeh – (r) and so forth. As a result Access databases are broken and there is a little chance to convert them back. If you open a broken database with a HEX editor you’ll see, for instance, the ‘(c)’ text at offset 21h while the 0a9h byte must be there. Access Password can detect a broken database and raise a warning that the database is broken rather than password-protected. We can try to recover your broken database manually but please note that it is a rather expensive service. Email us for a price quote. In your letter, please specify the size of your database.

    Download Access Password Demo


    SQL: Crear la base de datos #sql, #dbms, #modello #relazionale, #relazione, #database, #foreign #key, #publication, #author, #person, #publisher, #institution, #thesis, #jdbc, #odbc, #esql, #code, #default, #postgresql, #gratis, #gratuito, #free, #corso, #guida, #elemento, #creazione, #


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    Crear la base de datos

    Una base de datos en un sistema relacional estпїЅ compuesta por un conjunto de tablas, que corresponden a las relaciones del modelo relacional. En la terminologпїЅa usada en SQL no se alude a las relaciones, del mismo modo que no se usa el tпїЅrmino atributo, pero sпїЅ la palabra columna, y no se habla de tupla, sino de lпїЅnea. A continuaciпїЅn se usarпїЅn indistintamente ambas terminologпїЅas, por lo que tabla estarпїЅ en lugar de relaciпїЅn, columna en el de atributo y lпїЅnea en el de tupla, y viceversa.
    PrпїЅcticamente, la creaciпїЅn de la base de datos consiste en la creaciпїЅn de las tablas que la componen. En realidad, antes de poder proceder a la creaciпїЅn de las tablas, normalmente hay que crear la base de datos, lo que a menudo significa definir un espacio de nombres separado para cada conjunto de tablas. De esta manera, para una DBMS se pueden gestionar diferentes bases de datos independientes al mismo tiempo sin que se den conflictos con los nombres que se usan en cada una de ellas. El sistema previsto por el estпїЅndar para crear los espacios separados de nombres consiste en usar las instrucciones SQL “CREATE SCHEMA”. A menudo, dicho sistema no se usa (o por lo menos no con los fines y el significado previstos por el estпїЅndar), pero cada DBMS prevпїЅ un procedimiento propietario para crear una base de datos. Normalmente, se amplпїЅa el lenguaje SQL introduciendo una instrucciпїЅn no prevista en el estпїЅndar: “CREATE DATABASE”.
    La sintaxis empleada por PostgreSQL, pero tambiпїЅn por las DBMS mпїЅs difundidas, es la siguiente:

    CREATE DATABASE nombre_base de datos

    Con PostgreSQL estпїЅ a disposiciпїЅn una orden invocable por shell Unix (o por shell del sistema usado), que ejecuta la misma operaciпїЅn:

    createdb nombre_base de datos

    Para crear nuestra base de datos bibliogrпїЅfica, usaremos pues la orden:

    Una vez creada la base de datos, se pueden crear las tablas que la componen. La instrucciпїЅn SQL propuesta para este fin es:

    CREATE TABLE nombre_tabla (
    nombre_columna tipo_columna [ clпїЅusula_defecto ] [ vпїЅnculos_de_columna ]
    [. nombre_columna tipo_columna [ clпїЅusula_defecto ] [ vпїЅnculos_de_columna ]. ]
    [. [ vпїЅnculo_de tabla]. ] )

    nombre_columna. es el nombre de la columna que compone la tabla. SerпїЅa mejor no exagerar con la longitud de los identificadores de columna, puesto que SQL Entry Level prevпїЅ nombres con no mпїЅs de 18 caracteres. ConsпїЅltese, de todos modos, la documentaciпїЅn de la base de datos especпїЅfica. Los nombres tienen que comenzar con un carпїЅcter alfabпїЅtico.

    tipo_columna. es la indicaciпїЅn del tipo de dato que la columna podrпїЅ contener. Los principales tipos previstos por el estпїЅndar SQL son:

    • CHARACTER(n)
      Una cadena de longitud fija con exactamente n caracteres. CHARACTER se puede abreviar con CHAR
  • CHARACTER VARYING(n)
    Una cadena de longitud variable con un mпїЅximo de n caracteres. CHARACTER VARYING se puede abreviar con VARCHAR o CHAR VARYING.

  • INTEGER
    Un nпїЅmero estero con signo. Se puede abreviar con INT. La precisiпїЅn, es decir el tamaпїЅo del nпїЅmero entero que se puede memorizar en una columna de este tipo, depende de la implementaciпїЅn de la DBMS en cuestiпїЅn.

  • SMALLINT
    Un nпїЅmero entero con signo y una precisiпїЅn que no sea superior a INTEGER.

  • FLOAT(p)
    Un nпїЅmero con coma mпїЅvil y una precisiпїЅn p. El valor mпїЅximo de p depende de la implementaciпїЅn de la DBMS. Se puede usar FLOAT sin indicar la precisiпїЅn, empleando, por tanto, la precisiпїЅn por defecto, tambiпїЅn пїЅsta dependiente de la implementaciпїЅn. REAL y DOUBLE PRECISION son sinпїЅnimo para un FLOAT con precisiпїЅn concreta. TambiпїЅn en este caso, las precisiones dependen de la implementaciпїЅn, siempre que la precisiпїЅn del primero no sea superior a la del segundo.

  • DECIMAL(p,q)
    Un nпїЅmero con coma fija de por lo menos p cifras y signo, con q cifras despuпїЅs de la coma. DEC es la abreviatura de DECIMAL. DECIMAL(p) es una abreviatura de DECIMAL(p,0). El valor mпїЅximo de p depende de la implementaciпїЅn.

  • INTERVAL
    Un periodo de tiempo (aпїЅos, meses, dпїЅas, horas, minutos, segundos y fracciones de segundo).

  • DATE, TIME y TIMESTAMP
    Un instante temporal preciso. DATE permite indicar el aпїЅo, el mes y el dпїЅa. Con TIME se pueden especificar la hora, los minutos y los segundos. TIMESTAMP es la combinaciпїЅn de los dos anteriores. Los segundos son un nпїЅmero con coma, lo que permite especificar tambiпїЅn fracciones de segundo.

  • clпїЅusula_defecto. indica el valor de defecto que tomarпїЅ la columna si no se le asigna uno explпїЅcitamente en el momento en que se crea la lпїЅnea. La sintaxis que hay que usar es la siguiente:

    donde valor es un valor vпїЅlido para el tipo con el que la columna se ha definido.

    vпїЅnculos_de_columna. son vпїЅnculos de integridad que se aplican a cada atributo concreto. Son:

    • NOT NULL, que indica que la columna no puede tomar el valor NULL.
    • PRIMARY KEY, que indica que la columna es la llave primaria de la tabla.
    • una definiciпїЅn de referencia con la que se indica que la columna es una llave externa hacia la tabla y los campos indicados en la definiciпїЅn. La sintaxis es la siguiente:

    Las clпїЅusulas ON DELETE y ON UPDATE indican quпїЅ acciпїЅn hay que ejecutar en el caso en que una tupla en la tabla referenciada sea eliminada o actualizada. De hecho, en dichos casos en la columna referenciante (que es la que se estпїЅ definiendo) podrпїЅa haber valores inconsistentes. Las acciones pueden ser:

    • CASCADE: eliminar la tupla que contiene la columna referenciante (en el caso de ON DELETE) o tambiпїЅn actualizar la columna referenciante (en el caso de ON UPDATE).
    • SET DEFAULT: asignar a la columna referenziante su valor de defecto.
    • SET NULL: asignar a la columna referenciante el valor NULL.
  • un control de valor, con el que se permite o no asignar un valor a la columna en funciпїЅn del resultado de una expresiпїЅn. La sintaxis que se usa es:

    donde expresiпїЅn_condicional es una expresiпїЅn que ofrece verdadero o falso.
    Por ejemplo, si estamos definiendo la columna COLUMNA1, con el siguiente control:

    CHECK ( COLUMNA1 1000 )

    en dicha columna se podrпїЅn incluir sпїЅlo valores inferiores a 1000.

  • vпїЅnculo_de_tabla. son vпїЅnculos de integridad que se pueden referir a mпїЅs columnas de la tabla. Son:

    • la definiciпїЅn de la llave primaria:

    PRIMARY KEY ( columna1 [. columna2. ] ) VпїЅase que en este caso, a diferencia de la definiciпїЅn de la llave primaria como vпїЅnculo de columna, пїЅsta se puede formar con mas de un atributo.

  • las definiciones de las llaves externas:

    FOREIGN KEY ( columna1 [. columna2. ] ) definiciones_de_referencia

    La definiciпїЅn_de_referencia tiene la misma sintaxis y significado que la que puede aparecer como vпїЅnculo de columna.

  • un control de valor, con la misma sintaxis y significado que el que se puede usar como vпїЅnculo de columna.

  • Para aclarar mejor el uso de la instrucciпїЅn CREATE TABLE, veamos algunas пїЅrdenes que implementan la base de datos bibliogrпїЅfica ejemplificada.

    CREATE TABLE Publication (
    ID INTEGER PRIMARY KEY,
    type CHAR(18) NOT NULL
    );

    La instrucciпїЅn anterior crea la tabla Publication, formada por las dos columna ID de tipo INTEGER, y type de tipo CHAR(18). ID es la llave primaria de la relaciпїЅn. En el atributo type hay un vпїЅnculo de no nulidad.

    CREATE TABLE Book (
    ID INTEGER PRIMARY KEY REFERENCES Publication(ID),
    title VARCHAR(160) NOT NULL,
    publisher INTEGER NOT NULL REFERENCES Publisher(ID),
    volume VARCHAR(16),
    series VARCHAR(160),
    edition VARCHAR(16),
    pub_month CHAR(3),
    pub_year INTEGER NOT NULL,
    note VARCHAR(255)
    );

    Crea la relaciпїЅn Book, formada por nueve atributos. La llave primaria es el atributo ID, que es tambiпїЅn una llave externa hacia la relaciпїЅn Publication. Sobre los atributos title, publisher y pub_year hay vпїЅnculos de no nulidad. AdemпїЅs, el atributo publisher es una llave externa hacia la tabla Publisher.

    CREATE TABLE Author (
    publicationID INTEGER REFERENCES Publication(ID),
    personID INTEGER REFERENCES Person(ID),
    PRIMARY KEY (publicationID, personID)
    );

    Crea la relaciпїЅn Author, compuesta por dos atributos: publicationID y personID. La llave primaria en este caso estпїЅ formada por la combinaciпїЅn de los dos atributos, como estпїЅ indicado por el vпїЅnculo de tabla PRIMARY KEY. PublicationID es una llave externa hacia la relaciпїЅn Publication, mientras que personID lo es hacia la relaciпїЅn Person.

    El archivo create_biblio.sql contiene todas las пїЅrdenes necesarias para crear la estructura de la base de datos bibliogrпїЅfica ejemplificada.

    NOTA SOBRE POSTGRESQL
    En PotgreSQL, por lo menos hasta la versiпїЅn 6.5.1, no se han implementado todavпїЅa los vпїЅnculos sobre las llaves externas. El parser acepta, de todos modos, las sintaxis SQL que le afectan, y por tanto los constructos FOREIGN KEY y REFERENCES no producen un error, sino sпїЅlo un warning.


    SQL SERVER – Restore Database Backup using SQL Script (T-SQL) – Journey to SQL Authority with Pinal Dave #sql #restore #database


    #

    SQL SERVER Restore Database Backup using SQL Script (T-SQL)

    In this blog post we are going to learn how to restore database backup using T-SQL script. We have already database which we will use to take a backup first and right after that we will use it to restore to the server. Taking backup is an easy thing, but I have seen many times when a user tries to restore the database, it throws an error.

    Step 1: Retrive the Logical file name of the database from backup.

    Step 2: Use the values in the LogicalName Column in following Step.

    Watch a 60 second video on this subject

    Let me know what you think of this blog post and if you use the T-SQL scripts displayed in this blog post, just let me know if it requires any improvement.

    I am trying to put together a script to restore a database from a different server with different credentials is this possible I am a tad lost on this

    RESTORE DATABASE dbname
    FROM DISK = \\different server\folder\dbname.bak
    (Where can I state my username and password to access Different server )

    Nupur Dave is a social media enthusiast and and an independent consultant.

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