B brokensun Unregistered / Unconfirmed GUEST, unregistred user! 2000-05-19 #3 在 MS SQLServer 中类似A left join C on A.x=C.x 用 where A.x*=C.x 更可靠。 如果你真的喜欢用Jion,则如: 设关联字段都为x 则有: FROM A LEFT JOIN (B LEFT JOIN C ON B.x = C.x) ON A.x = C.x
在 MS SQLServer 中类似A left join C on A.x=C.x 用 where A.x*=C.x 更可靠。 如果你真的喜欢用Jion,则如: 设关联字段都为x 则有: FROM A LEFT JOIN (B LEFT JOIN C ON B.x = C.x) ON A.x = C.x
A adminis Unregistered / Unconfirmed GUEST, unregistred user! 2000-05-20 #5 直接写不行吗? select * from a left join c on c.x=a.x left join b on b.x=c.x 这个语句在SQL7里面直接通过,没有问题呀!