SQL Scroll Cursor to Selectively Pick Rows In this example, we will use a scroll cursor and use the following items to selectively choose the record to work with instead of looping through rows one by one. FETCH FIRST:Moves to the first record. FETCH LAST:Moves the cursor to the last rec...
How to Write a Cursor in SQL Server with Transact-SQL Creating a SQL Server cursor with T-SQL is a consistent method that can process data on a set of rows. Once you learn the steps, you can easily duplicate them with various sets of logic to loop through data. Let’s walk through ...
SELECT @NodeValue = LogItem.value('(//*[local-name() = sql:variable("@NodeName")])[1]', 'nvarchar(500)') FROM @LogXml.nodes('/LogItem') AS T ( LogItem ); SELECT @NodePreValue = LogItem.value('(//*[local-name() = sql:variable("@NodeName")])[1]', 'nvarchar(500)') ...
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Code language:SQL (Structured Query Language)(sql) Finally, deallocate the cursor: DEALLOCATE cursor_name; SQL Server cursor example We’ll use theprodution.productstable from thesample databaseto show you how to use a cursor: First, declare twovariablesto hold product name and list price, and...
(1)If CURSOR_SPACE_FOR_TIMEis set to false (the default), then a cursor can be deallocatedfromthe library cache regardless ofwhether application cursors associated with its SQL statement are this case, Oracle Database must verify that the cursor containing the SQLstatement is in the library ca...
--在Oracle 11g中引入了AdaptiveCursor Sharing 特性,该特性监控查询语句执行的统计信息,并尽可能的根据相同的SQL语句,不同的绑定变量值,使用不同的执行计划。 2.2 Advantages of Adaptive Cursor Sharing(ACS的优势) Adaptive cursor sharing is asolution to give us the shareability of binds, with the plan adap...
This example demonstrates the use ofsp_cursorprepexec. It runs a query against thePersontable in theAdventureWorks2022database returning all records where first name is "Katherine". SQL USEAdventureWorks2022; GODECLARE@prep_handleINT, @cursorINT, @scrolloptINT=4104, @ccoptINT=8193, ...
SQL Server implicitly converts the cursor to another type if clauses inselect_statementconflict with the functionality of the requested cursor type. FOR UPDATE [ OFcolumn_name[ ,...n] ] Defines updatable columns within the cursor. IfOF <column_name> [, <... n>]is supplied, ...
Finally, the cursor library maintains the status of the cached data and returns this information to the application in the row status array. When the cursor library is used, calls to SQLFetchScroll cannot be mixed with calls to either SQLFetch or SQLExt...