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统计分析-mysql游标_MySQL

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Release: 2016-06-01 13:32:33
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统计分析-mysql游标

 

项目中的统计分析模块,使用存储过程对数据进行统计,满足用户查看报表数据的需求。之前对于mysql的游标使用较少,写个小例子,熟悉下游标以备忘。  

 

实现功能: 将shop_boss表中部分字段的值插入到test表中。

 

Sql代码  

CREATE DEFINER=`admin`@`%` PROCEDURE `test_cursor1`()  

BEGIN  

    #Routine body goes here...  

    DECLARE boss_count INT DEFAULT 0;#循环变量  

    DECLARE _boss_id INT(11);  

    DECLARE _user_id VARCHAR(10);  

    DECLARE _shop_id INT(11);  

    DECLARE _count INT DEFAULT 0;  

  

    DECLARE cur1 CURSOR FOR select boss_id,user_id,shop_id from shop_boss;#声明游标  

    OPEN cur1;#打开游标  

  

    select count(*) into _count from shop_boss;  

      

    WHILE boss_count

        FETCH cur1 INTO _boss_id, _user_id, _shop_id;  

        #select _boss_id;  

          

        insert into test values(_boss_id, _user_id, _shop_id);#插入数据  

        set boss_count = boss_count + 1;  

    END WHILE;  

  

    CLOSE cur1;#关闭游标  

  

END  

 

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