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 cursor have been fetched. 译:当你每次想通过cursor来对每条记录进行取
Introduction to PL/SQL cursor FOR LOOP statement The cursor FOR LOOP statement is an elegant extension of the numeric FOR LOOP statement. The numeric FOR LOOP executes the body of a loop once for every integer value in a specified range. Similarly, the cursor FOR LOOP executes the body of...
declarecursorcur_empisselectt.*fromscott.emp t;beginforr_empincur_emp loop dbms_output.put_line(r_emp.empno||''||r_emp.sal);endloop;end;
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:
end loop; 3、if使用 if(条件)then [真值语句块] end if; 4、单引号字符表示 ''':最外层两个单引号表示字符串引用,字符串中间第一个单引号表示转义,第二个单引号表示单引号。 例子: v_sql :='select count(*) from pm4h_mo.mdl_resmodel t1, pm4h_mo.mdl_resmodeltable t2 where...
In Oracle PL/SQL you can use the FOR loop statement to open a cursor and fetch rows. In Java JDBC you can open ResultSet and use while() statement to iterate rows. Oracle: -- Procedure that fetches rows from a cursor CREATE OR REPLACE PROCEDURE sp
PL/SQL Cursor Exercises: Write a program in PL/SQL to FETCH records with nested Cursors using Cursor FOR Loops.
FOR Introduces the condition that must be true if the FOR loop is to proceed. record Specifies an identifier that was assigned to an implicitly declared record with definition cursor%ROWTYPE. INcursor Specifies the name of a previously declared cursor. ...
隐式cursor当然是相对于显式而言的,就是没有明确的cursor的declare。在Oracle的PL/SQL中,所有的DML操作都被Oracle内部解析为一个cursor名为SQL的隐式游标,只是对我们透明罢了。 另外,我们前面提到的一些循环操作中的指针for 循环,都是隐式cursor。 隐式cursor示例一: ...
PLSQL 循环游标 cursor loop fetch into PLSQL 循环游标 cursor 的一点心得体会 set serveroutput on---打印输出信息，默认是FALSE declare ---申明变量，分号结束 v_pages number;v_numberPerPage number;v_totalPages number;v_cur sys_refcursor;diy_id number;diy_name varchar2(50);diy_date date;cur...