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, ...
Ahandle or name for a private SQL area in the PGA. Because cursors are closely associated with private SQL areas, theterms are sometimes used interchangeably. This isthe object that lives in a session’s memory , that dies, therefore, with the session,and ...
Oracle defines an execution cycle that executes an SQL statement and associates a cursor with it. The following illustration shows the execution cycle of an explicit cursor: Let’s examine each step in detail. Declare a cursor Before using an explicit cursor, you must declare it in the declarat...
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...
--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...
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...
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 ...
ExecutesSQLSpecialColumnswith SQL_ROWVER which creates a result set of columns that are automatically updated when any value in the row is updated. Returns the Cursor object. Each row has the following columns. scope: One of SQL_SCOPE_CURROW, SQL_SCOPE_TRANSACTION, or SQL_SCOPE_SESSION ...