Example2:检验游标是否打开,如果打开显示提取行数 DECLARE CURSOR emp_cursor IS SELECT empno,ename,job FROM emp; v_empno emp.empno%TYPE; v_name emp.ename%TYPE; v_job emp.job%TYPE; BEGIN OPEN emp_cursor; LOOP FETCH emp_cursor INTO v_empno,v_name,v_job; EXIT WHEN emp_cursor%NOTFOUND; E...
一个session cursor只能对应一个shared cursor,而一个shared cursor却可能同时对应多个session cursor。 当某个session cursor和其对应的shared cursor建立关联后,如果把cursor_space_for_time调成true,当一个session cursor处理完一条sql后,它就不会被destroy,Oracle会把其cache起来(我们称之为soft closed session curso...
一个session cursor只能对应一个shared cursor,而一个shared cursor却可能同时对应多个session cursor。 当某个session cursor和其对应的shared cursor建立关联后,如果把cursor_space_for_time调成true,当一个session cursor处理完一条sql后,它就不会被destroy,Oracle会把其cache起来(我们称之为soft closed session curso...
where owner=aIndexOwner and object_name=aIndexName;vSqlStr:='SELECT rows_per_block, count(*) blocks FROM (SELECT /*+ cursor_sharing_exact '||'dynamic_sampling(0) no_monitoring no_expand index_ffs('||aTableName||','||aIndexName||') noparallel_index('||aTableName||','||aIndexNam...
ORACLE中RECORD、VARRAY、TAB、IS REF CURSOR LE的使用及实例详解 create or replace procedure PRO_RECORD_ROW_TAB_EXAMPLE IS --记录一行二列的数据 type V_REC is RECORD( FACT_NO char(4), FACT_ODR_NO char(20) ); --对变量进行实例化
Declaring a cursor without any parameters is the simplest cursor. Let's take a closer look. Syntax The syntax for a cursor without parameters in Oracle/PLSQL is: CURSOR cursor_name IS SELECT_statement; Example For example, you could define a cursor called c1 as below. CURSOR c1 IS SELECT...
CursorManager cursorManager = dataProvider.createCursorManager(query); Cursor cursor = cursorManager.createCursor(); An application can create more than one Cursor from the same CursorManager. It would do this if, for example, it wanted to display different views of the same data. The Cursor inte...
For example, for lists, you can format text and background colors. Only Market Arrow does not contain any formatted text. To create a report: 1. Click Create a New Report. The layout templates are displayed. Tiled templates provide a layout for multiple views on one page. 2. Select a ...
For example, if the index is SUBSTR(id,1,3), then the database converts it to SUBSTR("ID",:SYS_B_0,:SYS_B_1)=:id, rendering the index invalid. Oracle 绑定变量 详解 http://www.cndba.cn/Dave/article/1572 二. 测试 2.1 cursor_sharing=exact,这是cursor_sharing的默认值 ...
游标属性：%FOUND、%NOTFOUND、%ROWCOUNT、%ISOPEN 1、显式游标 显式游标是由用户显式声明的游标。根据在游标中定义的查询，查询返回的行集可以包含零或多行，这些行称为活动集。游标将指向活动集中的当前行。 显式游标操纵过程：声明、打开、从游标中获取记录、关闭。 SETSERVEROUTPUTON; DECLARE CURSORcurIS...