record 是FOR LOOP 语句隐式创建的 %ROWTYPE 类型变量,用于表示对游标遍历中的每一行记录。record 变量只可以用于 FOR LOOP 语句内部。 2) cursor_name cursor_name 是显式创建的游标名称。FOR LOOP 语法除了使用显式创建的游标外,还可以直接使用 SELECT 语句来实现对游标进行遍历。 FOR record IN (select_statem...
Cursor for Loop Is an Extension of the Numeric For Loop provided by Oracle PL/SQL which works on specified cursors and performs OPEN, FETCH & CLOSE cursor statements implicitly in the background. Suggested Reading:Numeric For Loop In Oracle PL/SQL Syntax of Cursor For Loop. FOR loop_index ...
This Oracle tutorial explains how to use the CURSOR FOR LOOP in Oracle with syntax and examples. The syntax for the CURSOR FOR Loop in Oracle / PLSQL is:
declarel_sqlvarchar2(123);--variable that contains a queryl_c sys_refcursor;--cursor variable(weak cursor).l_res your_table%rowtype;--variable containing fetching databeginl_sql :='select * from your_table';--Open the cursor and fetching data explicitly--in the LOOP.openl_cforl_sql; ...
oracle for loop 我们在Oracle存储过程中需要遍历一张表,应该怎样做。我想大多少的人第一个念头就是Cursor。 比如: create or replace procedure StudyCursor( resulst out integer ) is v_tablename varchar(30); v_tabletype varchar(11); cursor mycursor is select * from cat; ...
Oracle/PLSQL: CURSOR FOR Loop The syntax for theCURSOR FOR Loopis: FOR record_index incursor_name LOOP {.statements.} END LOOP; You would use aCURSOR FOR Loopwhen you want to fetch and process every record in a cursor. TheCURSOR FOR Loopwill terminate when all of the records in the ...
This article shows the use of Oracle cursors for loops with an appropriate example. The process of opening, fetching, and closing is handled implicitly by a cursors FOR LOOP. If there is a need to FETCH and PROCESS each and every record from a cursor, th
ORACLE中用for in 使用cursor CURSOR cur IS SELECT * FROM xxx; FOR cur_result in cur LOOP BEGIN V_SUM :=cur_result.列名1+cur_result.列名2 END; END LOOP; END; 中的CURSOR cur IS得到的是什么? 用for in 能够得到什么? 答: AI检测代码解析...
ORACLE中用for in 使用cursor CURSOR cur IS SELECT * FROM xxx; FOR cur_result in cur LOOP BEGIN V_SUM :=cur_result.列名1+cur_result.列名2 END; END LOOP; END; 中的CURSOR cur IS得到的是什么? 用for in 能够得到什么? 答: CURSORcur IS是定义一个游标,然后把游标里定义的查询语句存储到游标...
oracle pl sql for循环游标 EMP表在SCOTT用户下。用SCOTT/TIGER登录。 代码: DECLARE CURSOR C_JOB IS SELECT EMPNO, ENAME, JOB, SAL FROM EMP WHERE JOB = 'MANAGER'; C_ROW C_JOB%ROWTYPE; BEGIN FOR C_ROW IN C_JOB LOOP DBMS_OUTPUT.put_line(C_ROW.EMPNO || '-' || C_ROW.ENAME || '...