Question

我是postgreSQL的新手。我正在尝试执行一些简单的查询，但我遇到了一个错误，我一直坚持。以下是一个简单的查询

select e.street, e.city 
from employee e join works w join managers m on e.Lastname=w.Lastname 
and w.Lastname=m.MLastname
where w.companyname='Union Pacific';

执行此查询时抛出的错误是

ERROR:  syntax error at or near "where"
LINE 4: where w.companyname='Union Pacific';
        ^

********** Error **********

ERROR: syntax error at or near "where"
SQL state: 42601
Character: 124

我无法理解这个错误。需要一些帮助。

Answer 1

你的意思是

select e.street, e.city 
from employee e
join works w
join managers m on (e.Lastname=w.Lastname and w.Lastname=m.MLastname)
where w.companyname='Union Pacific';

？可能不是。可能你的意思是：

select e.street, e.city 
from works w
join employee e on w.Lastname=e.Lastname
join managers m on w.Lastname=m.MLastname
where w.companyname='Union Pacific';

Answer 2

works的联接缺少连接条件。通过on或using跟进。

postgreSQL中的'where'子句错误

2 个答案: