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及操作时,就可以使用CURSOR FOR Loop。当cursor中所有的记录都取后,CUR...
cursormycursorisselect*fromcat; begin openmycursor; loop fetchmycursorintov_tablename,v_tabletype; null;--youcanusetablenameandv_tabletype endloop; closemycursor; endStudyCursor; 最近在看代码是,发现其实我们还有一个更方便的方法就是使用for in loop … end loop createorreplaceprocedureStudyFor( r...
1) PL/SQL cursor FOR LOOP example# The following example declares an explicit cursor and uses it in the cursorFOR LOOPstatement. DECLARECURSORc_productISSELECTproduct_name, list_priceFROMproductsORDERBYlist_priceDESC;BEGINFORr_productINc_productLOOPdbms_output.put_line( r_product.product_name ||...
CURSOR emp_cursor IS SELECT employee_id, last_name FROM employees WHERE department_id = 50; BEGIN FOR v_emp_record IN emp_cursor LOOP DBMS_OUTPUT.PUT_LINE(v_emp_record.employee_id || ' ' ||v_emp_record.last_name); END LOOP; END; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...
方式一：DECLARE CURSOR student_cursor IS SELECT id, name, salaray FROM employers; student student_cursor%ROWTYPE；BEGIN OPENstudent_cursor; LOOP FETCHstudent_cursorINTO student； EXIT WHENstudent_cursor%NOTFOUND; UPDATE students SET salary=student .salary*0.3 WHERE id=student.id; ...
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 || '...
比如cursor cur is select from table;。基于游标循环可遍历结果集中每一行。for rec in cur loop来处理游标数据。可以获取每一行的各个字段值。利用这些值进行相应业务逻辑处理。在循环过程中可进行异常处理。exception关键字用于捕获异常。例如出现数据类型不匹配异常。可以在异常处理块中记录错误信息。方便后续排查问题...
1. for in loop形式 DECLARE CURSOR c_sal IS SELECT employee_id, first_name || last_name ename, salary FROM employees ; BEGIN --隐含打开游标 FOR v_sal IN c_sal LOOP --隐含执行一个FETCH语句 DBMS_OUTPUT.PUT_LINE(to_char(v_sal.employee_id)||'---'|| v_sal.ename||'---'||to_ch...
declare cursor cur_emp is select t.* from scott.emp t; begin for r_emp in cur_emp loop dbms_output.put_line(r_emp.empno || ' ' || r_emp.sal);
CURSOR FOR Loop FOR employee_rec in c1 ---employee_rec直接用,不用提前定义 LOOP total_val := total_val + employee_rec.monthly_income; END LOOP; 当使用CURSOR FOR Loop时,不用我手工open cursor close cursor 应用: begin FOR emm IN ( SELECT ro_site, ns_site, product_line, wh_type ...