就像使用Postcodes进行内部联接一样

Question

我有2个表都带有邮政编码表1有完整的邮政编码，表2只有邮政编码的区域部分，前2到4个字符用空格隔开。 像这样 表1'bb1 2ef'表2只有区域部分前2 - 4个字符 表2'bb1'

我想基于此加入这些表。最初我以为我可以在联接上做一个类似的条款，但似乎无法做到这一点。

SELECT * FROM dbo.Users AS u
INNER JOIN tbl_AdvisorsTeritories AS at
ON u.Postcode Like at.Postcode'%'

Answer 1

使用LEFT

SELECT * FROM dbo.Users AS u
INNER JOIN tbl_AdvisorsTeritories AS at
ON LEFT(u.Postcode,3) = at.Postcode