How to use 'UNION' between two different databaseservers

Question

Hello,
Could someone help me out. I am trying to find out if and how to use 'UNION' between two different databaseservers.
We have 2 different queries, each queries on a different database; one MySQL the other MSSQL.
Could someone tell me how to use 'UNION' between thes 2 queries?
Thanks in advance,
Samir Benalla

Answer 1

Hello
You may use openrowset statement, (OPENROWSET (Transact-SQL))., but before you use this, you must configure your server
sample:
SELECT a.*
FROM OPENROWSET('SQLNCLI', 'Server=Seattle1;Trusted_Connection=yes;',
     'SELECT GroupName, Name, DepartmentID
      FROM AdventureWorks2012.HumanResources.Department
      ORDER BY GroupName, Name') AS a
UNION
     SELECT GroupName, Name, DepartmentID
      FROM AdventureWorks2012.HumanResources.Department
      ORDER BY GroupName, Name
With this you can define a connection using native client to server Seattle1, and execute a query there, The results will be spooled on your server.
Connectionstring
Server=[SERVER_NAME];datasource=[YOUR DATABASE NAME];user_id=sa;password=sapassword'
if you use FQDN on your Query, than the datasource parameter in connection string can be letf out.
Regards
János.
take care of performance, it can be very slow,