Question

请查看以下查询：

tbl_EASY_INVOICECONTROLDB.dbo.impersonalaccount

departmentname  accountid   accountname         accounttype
------------------------------------------------------------
Football Club   82425       Consultancy         G/L Account
Stadium Ltd     82425       Professional fees   G/L Account

tbl_documents4.dbo.GLcodetable2

username      item      department
------------------------------------------------------
RAY           82425     otrUserSettingsGLcodes_Stadium
RAY           82425     otrUserSettingsGLcodes

查询

SELECT     
    A.item, A.username,  A.department, 
    B.departmentname, B.accounttype, B.accountname
FROM         
    dbo.GLcodetable2 AS A 
LEFT OUTER JOIN 
    EASY_INVOICECONTROLDB.dbo.impersonalaccount AS B ON A.item = B.accountid
WHERE
    (A.item = '82425') AND (A.username = 'RAY')

结果：

item           username       department                        departmentname      accountype      accountname
---------------------------------------------------------------------------------------------------------------------
82425          RAY        otrUserSettingsGLcodes                Football Club      G/L Account       Consultancy
82425          RAY        otrUserSettingsGLcodes_Stadium        Football Club      G/L Account       Consultancy      
82425          RAY        otrUserSettingsGLcodes                Stadium Ltd        G/L Account       Professional fees      
82425          RAY        otrUserSettingsGLcodes_Stadium        Stadium Ltd        G/L Account       Professional fees

某些数据线出现了两次。

我正在尝试将两个表连接在一起，并获得每个部门名称的一个结果。

我试过GROUP BY，但这似乎不起作用。

提前谢谢。

修改

我正在寻找的结果是

item           username       department                        departmentname      accountype      accountname
-----------------------------------------------------------------------------------------------------------------------------
82425          RAY        otrUserSettingsGLcodes                Football Club      G/L Account       Consultancy        
82425          RAY        otrUserSettingsGLcodes_Stadium        Stadium Ltd        G/L Account       Professional fees

Answer 1

如果您需要两个表中的所有列，那么您将获得四个记录，但如果您从部门列中删除，那么您将获得基于部门名称的两个记录。试试这样，我在你的查询中评论了部门专栏。

SELECT      
A.item, 
A.username, 
--A.department, 
B.departmentname, 
B.accounttype, 
B.accountname

FROM         @GLcodetable2 AS A 
LEFT OUTER JOIN @impersonalaccount AS B ON A.item = B.accountid
WHERE     (A.item = '82425') AND (A.username = 'RAY')
group by A.item, 
A.username, 
--A.department, 
B.departmentname, 
B.accounttype, 
B.accountname

Answer 2

根据要求，您可以检查在连接条件中添加部门

ON A.ItemID = B.AccountID AND A.department = B.departmentName

内部连接来自不同数据库的两个表而不重复

2 个答案: