Question

鉴于以下两个表：

PROJ_CUSTOM                                PSR_FINAL_DATA
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

PROJ_ID          PROJ_NAME                 PROJ_ID             ACCT_ID

61000.001.ABC    Accounting                61000.001.ABC       610-10-23
61000.001.ABD    Marketing                 61000.001.ABD       610-20-23
61000.001.ABE    Applications              61000.001.ABE       610-30-23
61000.001.ABF    HR                        61000.001.ABF       610-40-23
61000.001.ABG    Foo                       61000.001.ABG       610-50-23
61000.001.ABC    Accounting                61000.001.ABC       610-10-23
61000.001.ABD    Marketing                 61000.001.ABD       610-20-23
61000.001.ABE    Applications              61000.001.ABE       610-30-23
61000.001.ABF    HR                        61000.001.ABF       610-40-23
61000.001.ABG    Foo                       61000.001.ABG       610-50-23

以下sql：

SELECT  PROJ_ID, PROJ_NAME
FROM    DELTEK.PROJ_CUSTOM
INNER JOIN 
(
SELECT  PROJ_ID AS Project
FROM    DELTEK.PSR_FINAL_DATA
GROUP BY PROJ_ID
) FinalDb
ON      FinalDb.Project = PROJ_ID
WHERE   PROJ_ID LIKE '61000.001.[A-Z]%';

sql返回PROJ_ID和PROJ_NAME列。

我如何能够从表2（PSR_FINAL_DATA）添加ACCT_ID列？

Answer 1

只要每个PROJ_ID的ACCT_ID始终相同，您可以尝试：

SELECT  Custom.PROJ_ID, Custom.PROJ_NAME, FinalDb.ACCT_ID
FROM    DELTEK.PROJ_CUSTOM Custom
INNER JOIN 
(
SELECT  DISTINCT PROJ_ID, ACCT_ID
FROM    DELTEK.PSR_FINAL_DATA
) FinalDb
ON      FinalDb.PROJ_ID = Custom.PROJ_ID
WHERE   Custom.PROJ_ID LIKE '61000.001.[A-Z]%';

Answer 2

当您通过Proj_ID进行分组时，您只能在ACCT_ID上添加聚合函数才能返回，首先我无法理解您使用group by的原因，不能只使用简单的选择如下所示

SELECT  PROJ_ID, PROJ_NAME FROM    DELTEK.PROJ_CUSTOM
INNER JOIN 
(
SELECT  PROJ_ID,ACC_ID
FROM    DELTEK.PSR_FINAL_DATA
) FinalDb
ON      FinalDb.Project = PROJ_ID
WHERE   PROJ_ID LIKE '61000.001.[A-Z]%';

Answer 3

让它也返回ACCT_ID。您只在此处返回PROJ_ID，PROJ_NAME：

SELECT PROJ_ID，PROJ_NAME。在那里包括ACCT_ID，看它是否有效。

Answer 4

SELECT  PROJ_ID, PROJ_NAME,ACCT_ID
FROM    DELTEK.PROJ_CUSTOM
INNER JOIN 
(
SELECT  PROJ_ID AS Project,ACCT_ID
FROM    DELTEK.PSR_FINAL_DATA
GROUP BY PROJ_ID
) FinalDb
ON      FinalDb.Project = PROJ_ID
WHERE   PROJ_ID LIKE '61000.001.[A-Z]%';

SQL：从内部联接子查询中返回带有2个表的附加列

4 个答案: