嗨,这是我试图在MySQL中执行的示例查询。它给出了一个错误现在用的是concat函数MySQL存储过程如何连接工作?
SELECT @grp :=San_Orange_CS_GRP as santoor_grp ,
@_11:=power(@grp,0.1)+0.1*@_11 AS concat "@grp" , "_11" ,
@_12:=power(@grp,0.2)+0.1*@_12 AS concat "@grp" , "_12"
FROM DUMMY JOIN (SELECT @_11:=0,@_12:=0) t;
时当我改变代码和语句后给在查询中的列名,每次,它工作正常。但问题是,我有大约100列,所以我不能保持对每一个我运行不同的市场GRP
SELECT @grp :=Orange_CS_GRP as Orange_CS_grp ,
@_11:=power(@grp,0.1)+0.1*@_11 Orange_CS_GRP_11 ,
@_12:=power(@grp,0.2)+0.1*@_12 AS Orange_CS_GRP_12
from DUMMY JOIN (SELECT @_11:=0,@_12:=0) t;
在此先感谢:-)
仍然发出错误... concat在您的查询中不正确.. – user3571489