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Topic: Update (SQL)

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	UPDATE (Transact-SQL)
		Specifies the condition to be met for the rows to be updated.
		If an update to a row violates a constraint or rule, violates the NULL setting for the column, or the new value is an incompatible data type, the statement is canceled, an error is returned, and no records are updated.
		If an update to a column or columns participating in a clustered index causes the size of the clustered index and the row to exceed 8,060 bytes, the update fails and an error message is returned.
	msdn.microsoft.com /en-us/library/ms177523.aspx (3377 words)

	SQL Server Database UPDATE STATISTICS Tips (Site not responding. Last check: )
		If you don't manually update the statistics, then you may find that many of the queries are running slowly because of incorrect statistics, and incorrectly blame SQL Server 2000 as being slower than SQL Server 7.0, which is just not the case.
		SQL Server follows a very specific set of rules on when it should update the statistics of an index.
		When a SQL Server database is under very heavy load, sometimes the auto update statistics feature can update the statistics at inappropriate times, such as the busiest time of the day.
	www.sql-server-performance.com /statistics.asp (2355 words)

	SQL Server Update: "Referential Integrity in Microsoft SQL Server"
		SQL Server's declarative RI supports both optional and required foreign key specification when a dependent row is to be inserted.
		The basic purpose of the update rule is to control updates such that a foreign key value cannot be updated to a value that does not correspond to a primary key value in the parent table.
		SQL Server optionally enables the user to code a single trigger with update, insert, and delete logic embedded within it, or to code separate triggers (one for update, one for insert, and one for delete).
	www.craigsmullins.com /sql_ref.htm (3345 words)

	Update SQL Generator (Site not responding. Last check: )
		Update the exisiting data on your database with TurboData generated update SQL statements.
		The data values in the update statements may be overridden by the user in the same way as the Test Data Generator.
		The generated statements can be executed directly on your target database, or the SQL statements may be saved to file to be executed later on a database and platform of your choice.
	www.turbodata.ca /help/updatesqlgenerator.htm (81 words)

	Update (SQL) - Wikipedia, the free encyclopedia
		Either all the rows can be updated, or a subset may be chosen using a condition.
		Set the value of column C1 in table T column to 1, only if in that row the value of C2 is "a".
		Mass update example: Set the value of column C1 in table T1 to 2, only if the value of column C2 is found in the sub list of values in column C3 in table T2 having the column C4 equal to 0.
	en.wikipedia.org /wiki/Update_(SQL) (269 words)

	MillScript System - Updating SQL Loader (Site not responding. Last check: )
		The SQL statement is used to construct a new function that will execute the update as required.
		Any subsequent arguments are assumed to be parameters to the SQL update and may be of any valid type(integer, string, date, etc).
		To execute the SQL update within a script, we apply the autoloaded function and must supply the connection as an argument, followed by any parameters that are required.
	www.millscript.org /reference/millscript/loaders/update_sql.html (345 words)

	Update SQL Server table statistics for performance kick
		Statistics are automatically updated when certain thresholds within SQL Server are met, i.e., the number of rows in the table increases or decreases by 10% of the number of rows the statistic was based on.
		This gave SQL Server a more realistic profile of the table, and we were able to run the UPDATE STATISTICS command only once per day instead of having to run it throughout the day when using the default sampling rate.
		In addition to updating the statistics on user tables, the procedure also checks system tables for stale statistics and the statistics are updated as needed.
	searchsqlserver.techtarget.com /tip/0,289483,sid87_gci1278729,00.html (2100 words)

	SQL Tutorial - Learn SQL
		SQL is short for Structured Query Language and is a widely used database language, providing means of data manipulation (store, retrieve, update, delete) and database creation.
		SQL aliases can be used with database tables and/or with database table columns, depending on task you are performing.
		The SQL HAVING clause is used to restrict conditionally the output of a SQL statement, by a SQL aggregate function used in your SELECT list of columns.
	www.sql-tutorial.net (556 words)

	Update Cascade Package
		Updates to primary keys that do not generate 'new' primary keys are not currently supported.
		When you update the primary key of a parent table, you might want to cascade the update to the children.
		A sql plus script that will show you all foreign keys in a schema, the list of columns in the forieng key and the indexed columns used to support the foreign key list.
	asktom.oracle.com /~tkyte/update_cascade/index.html (2708 words)

	SQL Statements: SAVEPOINT to UPDATE, 8 of 8
		For you to update values in a table, the table must be in your own schema or you must have
		Specify the name of a column of the table or view that is to be updated.
		The expressions are evaluated as the row is updated.
	download-west.oracle.com /docs/cd/B10501_01/server.920/a96540/statements_108a.htm (1509 words)

	SQLCourse - Lesson 6: Updating Records
		The update statement is used to update or change records that match a specified criteria.
		After each update, issue a select statement to verify your changes.
		She has requested that her last name be updated to Weber-Williams.
	sqlcourse.com /update.html (260 words)

	UPDATE (T-SQL)
		If the table being updated is the same as the table in the FROM clause, and there is only one reference to the table in the FROM clause, table_alias may or may not be specified.
		If an update to a row violates a constraint or rule, if it violates the NULL setting for the column, or if the new value is an incompatible data type, the statement is canceled, an error is returned, and no records are updated.
		The results of an UPDATE statement are undefined if the statement includes a FROM clause that is not specified in such a way that only one value is available for each column occurrence that is updated (in other words, if the UPDATE statement is not deterministic).
	doc.ddart.net /mssql/sql70/ua-uz_3.htm (2563 words)

	Update - Wikipedia, the free encyclopedia
		Update (SQL), a SQL statement for changing database records
		Update (university computer club), an academic computer society at Uppsala University in Sweden.
		Updation, New System Development Life Cycle process SDLC used to indicate the act of updating records or values in a VSAM, Dataset, or DB2 database on a TSO Unix Mainframe Sysplex.
	en.wikipedia.org /wiki/Update (125 words)

	Configuring Custom SQL Queries for Basic Persistence Operations
		You can use TopLink to define an SQL query for each basic persistence operation (insert, update, delete, read-object, read-all, or does-exist) so that when you query and modify your relational-mapped objects, the TopLink runtime will use the appropriate SQL query instead of the default SQL query.
		When you customize the update persistence operation for an application that uses optimistic locking (see "Configuring Locking Policy"), the custom update string must not write the object if the row version field has changed since the initial object was read.
		Defines the update SQL that TopLink uses to update any changed existing object's data in the database.
	www.oracle.com /technology/products/ias/toplink/doc/1013/main/_html/reldscfg004.htm (761 words)

	Microsoft SQL Server: SQL Server 2005 Downloads (Site not responding. Last check: )
		Try SQL Server 2005 software on your servers to see how its advanced technologies help to reduce your total cost of ownership (TCO) and drive efficiency to your organization.
		The 180-day trial software for SQL Server is free to download, or you can order the DVD.
		SQL Server 2005 Express Edition is the free, easy-to-use, lightweight version of SQL Server 2005.
	www.microsoft.com /sql/downloads/default.mspx (267 words)

	Chapter 16. Native SQL
		Native sql queries which query for entities that is mapped as part of an inheritance must include all properties for the baseclass and all it subclasses.
		Named SQL queries may be defined in the mapping document and called in exactly the same way as a named HQL query.
		The SQL is directly executed in your database, so you are free to use any dialect you like.
	www.hibernate.org /hib_docs/v3/reference/en/html/querysql.html (2140 words)

	umweb: SQL
		SQL, (or Structured Query Language, also pronounced as "S-Q-L", or like the word "sequel" for short) is the collection of commands that are used to manipulate a database.
		This summary was written to be a guide for those new to working with SQL, and a reference for those who are still learning.
		After noticing that it's a lot of work to update someone's age every time they have a birthday, you might want to rethink your data model, and instead store their original birthdate.
	www.umich.edu /~umweb/how-to/sql.html (2758 words)

	Send SQL Server Data to Exchange - SQL Server Central
		Just make sure that the SQL Server Service Account has permission to update the Public Folder you are attempting to write to (right-click on the Public Folder in Outlook, select Properties, and go to the Permissions tab to set this up...).
		SQL 2005 UPDATE : MAPI calls in stored procedures are not enabled by default in SQL Server 2005; after an installation of SQL 2005 with default options, a MAPI initialization error is raised when such calls are executed.
		Using one table as a queue for holding all updates to be applied to an Exchange Public Folder, the records will not be replicated to another table indicating that the update was applied to the Exchange Server until the xp_sql2exchange stored procedures (hooked into a replication trigger script of the "update queue" table) signal success.
	www.sqlservercentral.com /articles/Miscellaneous/2985 (2745 words)

	How To Update a SQL Server Database by Using the SqlDataAdapter Object in Visual Basic .NET
		SqlDataAdapter is an intermediary object that populates an ADO.NET DataSet object with data that is retrieved from a SQL Server database and then updates the database to reflect the changes (such as inserts, updates, and deletes) that are made to the data by using the DataSet object.
		The InsertCommand, the UpdateCommand, and the DeleteCommand properties of the SqlDataAdapter object update the database with the data modifications that are run on a DataSet object.
		If an UPDATE statement that is automatically generated tries to update a row that has been deleted or does not contain the original values that are found in the DataSet, the command does not affect any records, and a DBConcurrencyException exception is generated.
	support.microsoft.com /kb/308055 (1348 words)

	Update SQL query - Dev Shed
		Discuss Update SQL query in the PHP Development forum on Dev Shed.
		Update SQL query PHP Development forum discussing coding practices, tips on PHP, and other PHP-related topics.
		UPDATE yourtablename SET us_cover= (case when us_cover='red' then 'orange' when us_cover='blue' then 'green' else us_cover end)
	forums.devshed.com /php-development-5/update-sql-query-294209.html (744 words)

	SQL Update Command (Site not responding. Last check: )
		This command is used to make changes to records in tables.
		The OPERATOR is one of the conditions listed on the Select Command page.
		This allows selection of all towns in states that begin with the word "north" allowing states like North Dakota and North Carolina to be selected.
	www.comptechdoc.org /independent/database/mysql/sqlupdate.html (107 words)

	Comparing two SQL databases with AdeptSQL Diff
		The schema matching engine generates effective update SQL for any schema difference you need to synchronize, trying to preserve the table data whenever possible.
		Although occasional bugfix updates are still possible, from now on the development efforts will be focused on AdeptSQL Diff 2.0, the next major version of the program.
		This version is an interim update with just a couple of minor corrections concerning comparison of comments and scripting of indexes.
	www.adeptsql.com /index.htm (784 words)

	15 Seconds : SQL Server 2005 XQuery and XML-DML - Part 3
		The aim is to update the value of one element within the XML document in the Demographics column for all 700+ rows in the StoreTyped table.
		An UPDATE statement is used to replace the content of the Demographics column with a new XML document for the row specified by the @custid parameter.
		SQL Server 2005 is not the first database to provide these features, but the combination of these new features and integration with ADO.NET make it easy to take advantage of them, while vastly reducing the amount of code you have to write.
	www.15seconds.com /issue/050818.htm (5335 words)

	DBAzine.com: Using ADO.NET to Update SQL Server
		The SqlCommandBuilder creates SQL statements used by the Update method of a SqlDataAdapter.
		The SQL Profiler reveals exactly why the concurrency violation was detected.
		This difference causes the WHERE clause to fail and the exception to be thrown.
	www.dbazine.com /sql/sql-articles/cook5 (1278 words)

	SQL Update
		The SQL UPDATE statement allows you to update an existing record in the database.
		In fact, the syntax for a basic UPDATE statement is very similar to a SELECT statement.
		To update multiple fields, separate each field assignment with a comma.
	www.quackit.com /sql/tutorial/sql_update.cfm?pageView=Print (88 words)

	Updated SQL Injection - SQL Server Central
		Finally, no matter how many SQL Injection articles are posted around the Web, DBA's and developers continue to post highly exploitable code samples to newsgroups and discussion boards.
		SQL Injection is a method of exploiting databases via the user interface.
		SQL Injection is a tactic used by hackers to gain unauthorized access to confidential data stored in SQL Server.
	www.sqlservercentral.com /articles/Security/updatedsqlinjection/2065 (1612 words)

	SQL Commands - SQL Commands Reference
		SQL Commands is a website demonstrating how to use the most frequently used SQL clauses.
		SQL Commands is not a comprehensive SQL Tutorial, but a simple guide to SQL clauses available online for free.
		Each of the SQL commands articles is ilustrated with practical examples, designed to help you learn the SQL commands syntax.
	www.sqlcommands.net (83 words)

	Update
		Annotation used to decorate a method in a Query interface with a SQL statement that can return an update count or can return auto generated keys.
		The SQL command that is specified can return an update count.
		The SQL command must not return a result set.
	java.sun.com /javase/6/jcp/beta/apidiffs/java/sql/Update.html (462 words)

	update sql issue - Dev Shed
		Discuss update sql issue in the PHP Development forum on Dev Shed.
		update sql issue PHP Development forum discussing coding practices, tips on PHP, and other PHP-related topics.
		PHP is an open source scripting language that has taken the web development industry by storm.
	forums.devshed.com /php-development-5/update-sql-issue-68741.html (556 words)

	SQL::Abstract - Generate SQL from Perl data structures - search.cpan.org
		However, in using that module I found that what I really wanted to do was generate SQL, but still retain complete control over my statement handles and use the DBI interface.
		For example, if you have an arbitrary data structure and know what the rest of your SQL is going to look like, but want an easy way to produce a WHERE clause, use this.
		This module is free software; you may copy this under the terms of the GNU General Public License, or the Artistic License, copies of which should have accompanied your Perl kit.
	search.cpan.org /~nwiger/SQL-Abstract-1.21/lib/SQL/Abstract.pm (2688 words)

	A JSTL primer, Part 4: Accessing SQL and XML content
		Queries and updates are specified as SQL statements, which may be parameterized using an approach based on JDBC's
		Transactions are used to protect a sequence of database operations that must either succeed or fail as a group.
		As you might expect, all nested queries and updates must use the same datasource as the transaction itself.
	www-128.ibm.com /developerworks/java/library/j-jstl0520 (3427 words)

	SQL UPDATE
		The UPDATE statement is used to modify the data in a table.
		The HTML Certificate is for developers who want to document their knowledge of HTML, XHTML, and CSS.
		The ASP Certificate is for developers who want to document their knowledge of ASP, SQL, and ADO.
	www.w3schools.com /sql/sql_update.asp (275 words)

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