merge three table in on table

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SQL-Server-2008

Hi,
I have three table
1) SysSettings 2) SysSettingsDep 3) SysSettingsMachine
now, we want to merge this table according the following condition-:
1) merge them to one table that's name "SysSettingsCustomer" by column "SettingKey"
2) when merge them i have a column "TableName" to show "settingKey" Which table is yours
I want the result like this:
SysSettingKey _ TableName
------------------------------
CompanyName _ SysSettingDep

I hope you understand my problem so, please help me.
tnx
_Amir

Posted 9-Oct-12 22:43pm

amirmohamad

Updated 9-Oct-12 23:36pm

v4

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skydger 10-Oct-12 4:51am

Have you tried to create such a query? Where have you stuck?

amirmohamad 10-Oct-12 5:32am

Yes i want to create query,

Om Prakash Pant 10-Oct-12 5:38am

Agree that you want to create a query, but what all you have tried so far?

amirmohamad 10-Oct-12 5:51am

I use this code but dosen't work:
select B.SettingKey SettingKey from dbo.SysSettings A
inner join dbo.SysSettingsDep B on A.SettingKey = B.SettingKey
union
select C.SettingKey SettingKey from dbo.SysSettings A
inner join dbo.SysSettingsMachine C on A.SettingKey = C.SettingKey

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skydger · Answer 1 · 2012-10-10T01:54:00

If I understand your question in a right way, I think the following solution could be useful.

SQL

select B.SettingKey SettingKey, 'SysSettingsDep' AS TableName
  from dbo.SysSettings A 
 inner join dbo.SysSettingsDep B on A.SettingKey = B.SettingKey
 union 
select C.SettingKey SettingKey, 'SysSettingsMachine' AS TableName
  from dbo.SysSettings A
 inner join dbo.SysSettingsMachine C on A.SettingKey = C.SettingKey