Additional check in Delete Transaction

Question

I'd like to add 2 if statements to the this delete transaction and check the @rowcount value before the COMMIT, is this the correct way to do it:
DECLARE @APP_ID uniqueidentifier
SET @APP_ID = '1234'
BEGIN TRY
BEGIN TRANSACTION;
--There could be more than 1 record deleted from this Table
DELETE
FROM dbo.SERVERS_APPS
WHERE SA_APP_ID = @APP_ID
IF @@ROWCOUNT >= 1
--There should only be than 1 record deleted from this Table
DELETE
FROM dbo.ENVIRONMENTS_APPS
WHERE ENVA_APP_ID = @APP_ID
IF @@ROWCOUNT = 1
COMMIT TRANSACTION;
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION
END CATCH

Answer 1

Instead of the way you have written, I would suggest that you write only one IF statement checking the count of the records as required.
DECLARE @APP_ID UNIQUEIDENTIFIER
SET @APP_ID = '1234'
BEGIN TRY
BEGIN TRANSACTION;
IF (SELECT COUNT(1) FROM dbo.SERVERS_APPS
WHERE SA_APP_ID = @APP_ID)>=1
AND
(SELECT COUNT(1) FROM dbo.ENVIRONMENTS_APPS
WHERE ENVA_APP_ID = @APP_ID)=1
BEGIN
DELETE
FROM dbo.SERVERS_APPS
WHERE SA_APP_ID = @APP_ID
DELETE
FROM dbo.ENVIRONMENTS_APPS
WHERE ENVA_APP_ID = @APP_ID
END
COMMIT TRANSACTION;
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION
END CATCH
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