FOR employee_rec in c1 LOOP total_val := total_val + employee_rec.monthly_income; END LOOP; RETURN total_val; END; In this example, we've created a cursor called c1. TheCURSOR FOR Loopwill terminate after all records have been fetched from the cursor c1. 译:在这个示例中,我们建立了...
/* Open up a cursor for loop, also selecting * the "p" function which will write rows to * t2 for every row fetched from t1. */ FOR crec IN (Select tcol, p(tcol) FROM t1) LOOP -- Break out of the loop immediately EXIT; END LOOP; END; / Select COUNT(*) FROM t2; 注意:%...
Example 1: Cursor For Loop With Simple Explicit Cursor SET SERVEROUTPUT ON; DECLARE CURSOR cur_RebellionRider IS SELECT first_name, last_name FROM employees WHERE employee_id >200; BEGIN FOR L_IDX IN cur_RebellionRider LOOP DBMS_OUTPUT.PUT_LINE(L_IDX.first_name||' '||L_IDX.last_name)...
CURSOR <游标名称> IS <游标名称>%ROWTYPE; BEGIN OPEN <游标名称> LOOP FETCH <游标名称> INTO ; EXIT WHEN <游标名称>%NOTFOUND; <其它要执行的代码> END LOOP; CLOSE <游标名称>; END <存储过程名称>; / 代码例子: 复制内容到剪贴板 程序代码 TRUNCATE TABLE loop_test; DECLARE CURSOR ao_cur IS ...
Example:使用游标For循环打印输出员工信息: DECLARE CURSOR emp_cursor IS SELECT empno,ename,job FROM emp; BEGIN FOR emp_record IN emp_cursor LOOP DBMS_OUTPUT.PUT_LINE('员工号:'||emp_record.empno||'员工姓名'||emp_record.ename||'员工职位'||emp_record.job); END LOOP; END; ...
CREATE OR REPLACE PROCEDURE p_test_emp is CURSOR c1 is select empno, ename from emp;t_c1 c1%rowtype;err exception;begin open c1;loop FETCH c1 INTO t_c1;if (c1%found) then insert into emp_test (empno, ename) values (t_c1.empno, t_c1.ename);commit;else raise err;(...
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: CURSOR cur IS是定义一个游标,然后把游标里定义的查询语句存储到...
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||','||aIndexName||') */ sys_op_lbi...
13.3.4 使用cursor for隐式游标SQL隐式游标只能通过属性信息为PL/SQL编程提供帮助。用户无法操作SQL隐式游标。cursor for游标用于循环。利用该游标,用户可以像使用普通循环语句一样来循环处理select语句所获得的每一条记录。cursor for游标使用的一般语法如图所示。 13.3.4 使用cursor for隐式游标【示例13-20】cursor ...
Error: Cursor is null Description The cursor passed as a parameter to one of the security provider methods is null. Cause A null cursor is not supported. Action Modify the code to pass a non-null cursor. BEA-090250 Error: Cursor not found cursorName Description A cursor passed to the ...