The used SELECT statements have a different number of columns

mysql遇到的问题,

原因:

select a, b, c, d into @a, @b from xxx;

 

into 后面的字段少了就会报标题的错误

 

也有其他情况也会遇到这样的错误:

http://www.myhack58.com/Article/html/3/7/2011/29898.htm

http://www.2cto.com/Article/201212/178290.html

总之是select中的参数个数不对