How to check if database exist on Remote Server through SQL query

Question

I have a table as following in SQL Server 2012.

|---------------------|------------------|------------------|
|      ClientName     |     servername   |Datab         


        

Answer 1

Is there a way to return only rows for which database exists on the server names mentioned in the table?

I want it to be part of where clause.

If I understand your question correctly, you can use where exists

e.g. (you need to have server1 as linked server from the server that you are running the query from)

select * from 
schema.yourTable
where exists (select 1 from Server1.dbname.schemaName.yourServerList
                 where DatabaseName = 'b1')

Answer 2

So, I assume you already have all your server linked and you used an account, which can read the schema. Than script will be something like this:

SELECT TOP 0 * INTO #tbl_Server_DBs
FROM tbl_Server_DBs

DECLARE ServerDBs CURSOR LOCAL STATIC FORWARD_ONLY 
FOR SELECT ClientName, servername, Databasename FROM tbl_Server_DBs

DECLARE @ClientName NVARCHAR(128), @servername NVARCHAR(128), @Databasename NVARCHAR(128);
DECLARE @s NVARCHAR(4000)

OPEN ServerDBs
FETCH NEXT FROM ServerDBs 
INTO @ClientName, @servername, @Databasename

WHILE (@@fetch_status <> -1)
BEGIN
    SET @s = N'SELECT ''' + @ClientName + N''', ''' + @servername + N''', name 
        FROM [' + @servername + N'].sys.databases
        WHERE name = ''' + @Databasename + N''';';

    PRINT @s
    INSERT INTO #tbl_Server_DBs (ClientName, servername, Databasename)
    EXEC(@s);

    FETCH NEXT FROM ServerDBs 
    INTO @ClientName, @servername, @Databasename
END

CLOSE ServerDBs
DEALLOCATE ServerDBs

SELECT * FROM #tbl_Server_DBs;