Supporting different levels of visibility to changes made to the database data by other users that is presented in the result set. Note For a full description of the SQL Server cursor types, seeType of Cursors. The JDBC specification provides support for forward-only and scrollable cursors that...
当然可以。在SQL中,CURSOR是一种用于处理查询结果集的工具,它可以让你在查询结果集中逐行浏览和处理数据。使用CURSOR,你可以访问上一行的值,并在当前行的处理中使用它。 以下是一个使用CURSOR检索上一行值的示例: 代码语言:sql 复制 DECLARE @prev_value INT; DECLARE @current_value INT; DECLARE cursor_name ...
The SQLSRV driver lets you create a result set with rows that you can access in any order, depending on the cursor type. This topic will discuss client-side (buffered) and server-side (unbuffered) cursors. Cursor Types When you create a result set withsqlsrv_queryor withsqlsrv_prepare, ...
A weak REF CURSOR type does not specify a return type. The PL/SQL compiler accepts weakly typed cursor variables in any queries. Weak REF CURSOR types are interchangeable; therefore, instead of creating weak REF CURSOR types, you can use the predefined type weak cursor type SYS_REFCURSOR.Weak...
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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 ...
The cursor library supports the following fetch types in SQLFetchScroll. Expand table Cursor typeFetch types Forward-only SQL_FETCH_NEXT Static SQL_FETCH_NEXT SQL_FETCH_PRIOR SQL_FETCH_FIRST SQL_FETCH_LAST SQL_FETCH_RELATIVE SQL_FETCH_ABSOLUTE SQL_FETCH_...
適用対象:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance カーソルへの参照を含む、変数またはストアド プロシージャの OUTPUT パラメーターのデータ型。 注釈 cursor型の変数とパラメーターを参照できる操作は次のとおりです。 DECLARE@local_variableおよび SET@local_variableステートメン...
The first form of theDECLARE CURSORstatement uses the ISO syntax for declaring cursor behaviors. The second form ofDECLARE CURSORuses Transact-SQL extensions that allow you to define cursors using the same cursor types used in the database API cursor functions of ODBC or ADO. ...
ODBC and ADO define four cursor types supported by Microsoft SQL Server. The DECLARE CURSOR statement has been extended; thus you can specify the four cursor types for Transact-SQL cursors. These cursors vary in their ability to detect changes to the result set and in the resources, such as...