相关疑难解决方法(0)

当我创建保存的过程时,我可以创建一些变量是吗？例如:

CREATE PROCEDURE `some_proc` ()  
BEGIN  

   DECLARE some_var INT; 
   SET some_var = 3;
....

问题:但是如何从查询中设置变量结果,即如何制作如下:

DECLARE some_var INT;
SET some_var = SELECT COUNT(*) FROM mytable ;

？

我正在使用此代码有错误:

SET @rejects = '';

SELECT *
FROM list
WHERE maker = 1
    AND by_ids IN ('10','11')
    AND country LIKE '%I%'
    AND (
        src IS NULL
        || src NOT IN (@rejects)
        AND checkSrc(src) = 'yes'
        AND SET @rejects = CONCAT(@rejects,',',src)
    );

是什么导致了这个问题？