简单的MySql游标创建

DROP PROCEDURE IF exists proc_updusercourse_statistics_performance;
CREATE PROCEDURE proc_updusercourse_statistics_performance() 
BEGIN
  -- 游标返回变量
    DECLARE _school_id BIGINT(18);
    DECLARE _course_count INT(8);
    DECLARE _lw_month INT(10);
    DECLARE _lw_week INT(10);

  -- 游标状态标志
    DECLARE flag BOOLEAN DEFAULT TRUE;
    DECLARE cur CURSOR for 
      select school_id,sum(course_count) course_count,lw_month,lw_week from tb_teacher_performance group by lw_week,lw_month,school_id;

    -- 游标状态赋值
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET flag = FALSE;

    OPEN cur;

    FETCH cur INTO _school_id,_course_count,_lw_month,_lw_week;
    while flag do
           update tb_usercourse_statistics set performance_course_count = _course_count where school_id = _school_id and lw_month = _lw_month and LW_week = _lw_week;
  FETCH cur INTO _school_id,_course_count,_lw_month,_lw_week;
    COMMIT;
    END while;

  CLOSE cur;
END;
-- 调用存储过程
call proc_updusercourse_statistics_performance();

DROP PROCEDURE IF exists StatisticStore1;
CREATE PROCEDURE StatisticStore1() 
BEGIN
    DECLARE c_name VARCHAR(50);
    DECLARE c_id INT(6);
    -- 声明结束标志
    DECLARE i int default 1; 
    DECLARE b int default 0; 
    DECLARE cur CURSOR for SELECT name,id FROM tb_sort;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET b = 1;
-- 开启游标
    OPEN cur;

    FETCH cur INTO c_name,c_id;
    while b<>1 do
           INSERT INTO tb_books (NAME,author,buytime,sort_id) VALUES (concat(c_name,'下的图书',i),'ACCP',now(),c_id);
  FETCH cur INTO c_name,c_id;
    END while;
-- 关闭游标
  CLOSE cur;
END;

call StatisticStore1();