本文介绍了SQL 子句“GROUP BY 1"是什么意思?吝啬的?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有人向我发送了一个 SQL 查询,其中 GROUP BY
子句包含以下语句:GROUP BY 1
.
Someone sent me a SQL query where the GROUP BY
clause consisted of the statement: GROUP BY 1
.
这一定是打错字了吧?没有列被赋予别名 1.这意味着什么?我是否正确地认为这一定是一个错字?
This must be a typo right? No column is given the alias 1. What could this mean? Am I right to assume that this must be a typo?
推荐答案
意思是按第一列分组,不管它叫什么.你可以用 ORDER BY
做同样的事情.
It means to group by the first column regardless of what it's called. You can do the same with ORDER BY
.
这篇关于SQL 子句“GROUP BY 1"是什么意思?吝啬的?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!