Question

我正在尝试查找具有重复值的行，但仅基于选定数量的列，而不是单个列或整个行。例如，如果我的表看起来像这样：

ID     Address    State    Name
-------------------------------
0      7 Brown    NY       John
1      3 Red      WX       Jane
2      7 Brown    WX       Ted
3      7 Brown    NY       Fred

我的问题是：

查找行的地址和州字段与另一行的地址和州字段匹配的行的所有ID。

此查询的答案是：

ID    Address    State    Name
------------------------------
0     7 Brown    NY       John
3     7 Brown    NY       Fred

任何想法？

建议： How to select multiple columns values same rows from single table

Answer 1

尝试以下方法：

SELECT A.*
FROM YourTable A
INNER JOIN (SELECT Address, State
            FROM YourTable
            GROUP BY Address, State
            HAVING COUNT(*) > 1) B
ON A.Address = B.Address AND A.State = B.State

Answer 2

select *
from #table1
where Addr + St in (select Addr + St as FullAddr
             from #table1
             group by Addr + St
             having count(Addr+St) > 1)

在多列中查找具有相同值的行

2 个答案: