CURSOR ao_cur IS Select SUBSTR(object_name,1,5) FIRSTFIVE FROM all_objs Where SUBSTR(object_name,1,5) BETWEEN 'A' AND 'M'; ao_rec ao_cur%ROWTYPE; BEGIN OPEN ao_cur; LOOP FETCH ao_cur INTO ao_rec; EXIT WHEN ao_cur%NOTFOUND; Insert INTO loop_test VALUES (ao_rec.firstfive); ...
CURSOR ao_cur IS Select SUBSTR(object_name,1,5) FIRSTFIVE FROM all_objs Where SUBSTR(object_name,1,5) BETWEEN 'A' AND 'M'; ao_rec ao_cur%ROWTYPE; BEGIN OPEN ao_cur; LOOP FETCH ao_cur INTO ao_rec; EXIT WHEN ao_cur%NOTFOUND; Insert INTO loop_test VALUES (ao_rec.firstfive); ...
deptnoFROMemp_pl;BEGINFORemp_recordINemp_cursorLOOP-- implicit open and implicit fetch occurIFemp_...
/* 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:%...
type v_cur_type is ref cursor; --自定义游标类型 v_cur v_cur_type; begin open v_cur for --打开游标并声明 select * from staff where id<5; loop --开始循环 fetch v_cur into v_cur_info; -- 赋值 exit when v_cur%notfound; --判断没有值就退出循环 ...
declare --定义游标并且赋值(is 不能和cursor分开使用) cursor stus_cur is select * from students; --定义rowtype cur_stu students%rowtype; /*开始执行*/ begin --开启游标 open stus_cur; --loop循环 loop --循环条件 exit when stus_cur%notfound; --游标值赋值到rowtype fetch stus_cur into cur...
OPEN cursor_name; loop FETCH cursor_name INTO var_employee; -- 处理查询结果,如打印员工信息 PRINT var_employee; EXIT WHEN cursor_name%NOTFOUND; END LOOP; CLOSE cursor_name; END; / ``` 5.总结与建议 Oracle Open Cursor及其参数为数据库开发者提供了一种高效、灵活的处理查询结果的方法。在实际开...
DECLARE -- 定义变量和游标 CURSOR c_data IS SELECT * FROM external_data_source; v_row c_data%ROWTYPE; BEGIN -- 打开游标 OPEN c_data; -- 循环插入数据 LOOP FETCH c_data INTO v_row; EXIT WHEN c_data%NOTFOUND; INSERT INTO target_table (column1, column2, column3) VALUES (v_row.col...
open mycursor; loop fetch mycursor into v_tablename,v_tabletype; null; --you can use tablename and v_tabletype end loop; close mycursor; end StudyCursor; 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 ...
END LOOP; --隐含关闭游标 END; 2.普通的游标循环 declare --定义游标并且赋值(is 不能和cursor分开使用) cursorstus_curisselect*fromstudents; --定义rowtype cur_stu students%rowtype; /*开始执行*/ begin --开启游标 openstus_cur; --loop循环 ...