SQL;如何使用Where条件只有一个列

Question

首先，

Select Count(*) 
From PROSPECT_MASTER //Result:12730 row 


Select Count(*) 
From YAZ..MARDATA.S_MUSTERI // Result: 1112 row 

这是我的查询;

SELECT a.ID, a.TURQ_ID, a.UNVAN, a.TIP, a.AKTOR, 
     a.GSM_ALAN, a.GSM_TEL, a.IS_ALAN, a.IS_TEL, 
     a.IS_EXT, a.EV_ALAN, a.EV_TEL, a.ADRES, 
     a.STF_KONTAK, 
     (CASE WHEN A.YAZ_ADRES IS NULL 
     THEN (B.IS_ADRES1 +' '+B.IS_ADRES2) 
     ELSE A.YAZ_ADRES END) 
     COLLATE DATABASE_DEFAULT AS YAZ_ADRES , A.SEHIR, A.PS, A.MEMO 
FROM PROSPECT_MASTER A, YAZ..MARDATA.S_MUSTERI B 
WHERE A.ID IN (B.TC_KIM_NO, B.VERGI_NO) // Result 1070 row 

为常，A.ID IN (B.TC_KIM_NO, B.VERGI_NO)条件正在与我的完整的查询，但我想这种情况将工作只有一列（YAZ_ADRES），因为A.ID并不拥有所有B.TC_KIM_NO或全部B.VERGI_NO

我的查询应该得到12730行，如计数为PROSPECT_MASTER表。但是我只想为YAZ_ADRES列运行A.ID IN (B.TC_KIM_NO, B.VERGI_NO)条件。

我该怎么做？

Answer 1

这听起来像我想你需要的是外连接？

SELECT a.ID, a.TURQ_ID, a.UNVAN, a.TIP, a.AKTOR, 
     a.GSM_ALAN, a.GSM_TEL, a.IS_ALAN, a.IS_TEL, 
     a.IS_EXT, a.EV_ALAN, a.EV_TEL, a.ADRES, 
     a.STF_KONTAK, 
     (CASE WHEN A.YAZ_ADRES IS NULL 
     THEN (B.IS_ADRES1 +' '+B.IS_ADRES2) 
     ELSE A.YAZ_ADRES END) 
     COLLATE DATABASE_DEFAULT AS YAZ_ADRES , A.SEHIR, A.PS, A.MEMO 
FROM PROSPECT_MASTER A 
LEFT OUTER JOIN YAZ..MARDATA.S_MUSTERI B 
ON A.ID IN (B.TC_KIM_NO, B.VERGI_NO) // Result 12730 rows