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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)') ...
SQL Server implicitly converts the cursor to another type if clauses in select_statement conflict with the functionality of the requested cursor type. FOR UPDATE [ OF column_name [ ,...n ] ] Defines updatable columns within the cursor. If OF <column_name> [, <... n>] is supplied, ...
(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...
Oracle also determines an execution plan, associates host variables andcursor parameterswith the placeholders in the SQL statement, determines the result set, and sets the cursor to the first row in the result set. More aboutparameterized cursorin the next tutorial. ...
The JDBC driver provides an adaptive buffering feature that allows you to retrieve statement execution results from the SQL Server as the application needs them, rather than all at once. For example, if the application should retrieve a large data that is too large to fit entirely in application...
Assume that you create a stored procedure that uses a cursor on a table variable in Microsoft SQL Server 2012 or SQL Server 2014. Additionally, the stored procedure updates the table by using a WHERE CURRENT OF statement together with the cursor. ...
--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...
Note:387394.1 Query usingBind Variables is suddenly slowNote:430208.1 Bind PeekingBy Example In Oracle 11g Adaptive CursorSharing has been introduced to get around some of these issues. Thisfeature monitors the execution statistics for candidates queries and makes itpossible for the same query to gene...
SQLSRV_SCROLL_RELATIVESpecifies the row specified with theoffsetparameter from the current row. Server-Side Cursors and the SQLSRV Driver The following example shows the effect of the various cursors. On line 33 of the example, you see the first of three query statements that specify different ...