mysql语法错误:Every derived table must have its own alias

mysql查询报错如图

报错原因

every derived table must have it own

alias 翻译过来就是:每一个派生出来的表都必须有一个自己的别名。

就是说子查询没有别名

解决方案

给子查询起个别名,可以写成这种形式
select count(*) from (select * from ……) as total;

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mysql语法错误:Every derived table must have its own alias

mysql查询报错如图

报错原因

解决方案

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