Question

I am stuck with a SQL query. How do I get all the databases names from multiple SQL Servers at a time? I have the server IP’s in a table.

Answer 1

This gives all the databases of the current server

EXEC sp_databases

If you know the other server ips you could use sp_addlinkedserver to link them and get the desired results.

EDIT: following is a complete answer for you as I described above but using sys.databases

DECLARE @T AS TABLE (dbName VARCHAR(250),ipAddress VARCHAR(20))
DECLARE @SERVERS AS TABLE (Id INT IDENTITY(1,1),serverIp VARCHAR(20),
                           rmUser VARCHAR(20),rmPassword VARCHAR(20))
DECLARE @ipAdd AS VARCHAR(20),@user AS VARCHAR(20), @pw AS VARCHAR(20),@rowCount AS INT

SELECT @rowCount = 1

--ADD THE LIST OF SERVERS WITH LOGIN USER NAME AND PASSWORDS HERE
INSERT INTO @SERVERS (serverIp,rmUser,rmPassword) 
    VALUES ('serverIp1','rmuser1','rmpassword1'), ('serverIp2','rmuser2','rmpassword2')

WHILE EXISTS(SELECT Id FROM @SERVERS WHERE Id = @rowCount)
BEGIN
SELECT @ipAdd = serverIp, @user= rmUser, @pw = rmPassword 
    FROM @SERVERS WHERE Id =  @rowCount

    --Link the server and add login
EXEC sp_addlinkedserver @ipAdd,N'SQL Server';
EXEC sp_addlinkedsrvlogin @rmtsrvname=@ipAdd, 
                          @useself='false',
                          @rmtuser=@user,
                          @rmtpassword=@pw

     --INSERT results into a temp view and then into @T
 EXEC('CREATE VIEW vTemp AS SELECT name FROM ['+@ipAdd+'].master.sys.databases')
 INSERT INTO @T  SELECT name,@ipAdd FROM vTemp

     --Drop view
 DROP VIEW vTemp

     --Drop login and link to the remort server
 EXEC sp_droplinkedsrvlogin @ipAdd, NULL
 EXEC sp_dropserver @ipAdd, NULL;

     SELECT @rowCount = @rowCount +1

END

--FINALLY YOUR RESULTS
SELECT * FROM @T