SQL查询 - Select语句

Question

我有一个表，其中的数据也能像这些如下：

CusID | Name | State | PhyAddress

160285 | FYZPZ | NULL | 0

160285 | FYZPZ | NJ | 1

160285 | FYZPZ | NJ | 1

或

CusID | Name | State | PhyAddress

160285 | FYZPZ | NJ xx | 1

或

CusID | Name | State | PhyAddress

160285 | FYZPZ | NULL | 0

160285 | FYZPZ | NJ xx | 0

我需要得到默认状态给用户。和逻辑是：

结果应该首先显示肌肉发展状态（PhyAddress = 1），并且如果 没有物理地址（PhyAddress = 0），那么它应该显示的邮件ADRESS状态（PhyAddress = 0）。如果没有，状态可以是空白的。

有多个客户在表的时候，每个人都可以有一个像上面多行，我需要得到默认状态为每一个客户。

的resuts需要展示的CusID, Name, State

结果请帮我查询。 TIA

Answer 1

使用（评论后编辑）：

SELECT DISTINCT Y.CusID, Y.Name, ISNULL (Y.S1, Y.S0) AS State 
FROM 
(
SELECT 
X.CusID, 
X.Name, 
(SELECT MAX (State) FROM Address T WHERE T.PhyAddress = 1 AND T.CusID = X.CusID) AS S1, 
(SELECT MAX (State) FROM Address T WHERE T.PhyAddress = 0 AND T.CusID = X.CusID) AS S0 
FROM Address AS X 
) AS Y 

Answer 2

搜索PhyAddress的最大值：

SELECT CusID, 
     State 
FROM table t1 
WHERE PhyAddress = 
    (
     SELECT MAX(t2.PhyAddress) 
     FROM table t2 
     WHERE t2.CusID = t1.CusID 
    ) 

Answer 3

你尝试过什么？

让我给你的东西让你去

Select CusID, Name, case when phyaddress = something then something 
     when 
     when 
     ELSE ' ' END as State 

from sometable 

where something 

Answer 4

你可以做类似

select CusID, Name, State, PhyAddress from sometable where (CusID, PhyAddress) in 
    (select CusID, max(PhyAddress) from sometable) 
    group by CusID, Name, State, PhyAddress