select * from a left outer join b on a.xh=b.xh
这是a表左连接b表的语句，如果我想同时实现a表左连接c表(a.xh=c.xh),同时左连接d表（a.xh=d.xh)等多个表，语句应该如何写??
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- SQL code
select * from ((a left outer join b on a.xh=b.xh) left join c on a.xh=c.xh) left join d on a.xh=d.xh