Remote Desktop Connection as an Admin

You might have come across situations where you need to connect to a remote desktop and some other users are holding sessions and the total number has exceeded and the mstsc command will not allow further sessions to the remote desktop of the server.

One easy way to kick one user out will be to use the following command to login

%SystemRoot%\system32\mstsc.exe /admin

and then type ur username and password to get in.

Try Catch block in a Transaction

We can use TRY catch blocks from SQL Server 2005 onwards and can rollback a transaction if there were any errors. Please see the example below


BEGIN TRY
 SET XACT_ABORT ON -- Will rollback on any errors
 BEGIN TRANSACTION    -- Start the transaction
   DELETE FROM Mytable
WHERE id = 'something'
   -- If we reach here, success!
   COMMIT
END TRY
BEGIN CATCH
  -- Whoops, there was an error
  IF @@TRANCOUNT > 0
     ROLLBACK

  -- Raise an error with the details of the exception
  DECLARE @ErrMsg nvarchar(4000), @ErrSeverity int
  SELECT @ErrMsg = ERROR_MESSAGE(),
         @ErrSeverity = ERROR_SEVERITY()

  RAISERROR(@ErrMsg, @ErrSeverity, 1)
END CATCH

Checking data in database before going for any inserts

We commonly encounter a scenario where we have to check if a data is already there in table before going for any insertions. So here is a quick query for this purpose

please note that i wrote this query keeping Sql Server in mind.

IF NOT EXISTS ( SELECT TOP 1 [NAME] FROM myTable WHERE [Name] = 'check_name' )
BEGIN

INSERT INTO myTable
           ([Name]
           ,[Description]
           )
     VALUES
           ('check_name'
           ,'test'
           )
END