postgresql 多表join

 

 

多表连接时，要注意语法，应该如下：

 

select * from a inner join b on a.id=b.id

inner join c on a.id=c.id

 

错误写法：

select * from a inner join b

inner join c

on a.id=b.id

and a.id=c.id

 

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