IF Condition in an SQL query

Question

I\'m a newbie to SQL Server. Please help me to write the following Logic in a query.

If getnow() > today 4 PM
Then
    SELECT *
    FROM table
    WHERE M         


        

Answer 1

IF ( DATEDIFF(h, GETDATE(), DATEADD(h,4,GETDATE()))>0 )

SELECT *
FROM table
WHERE MailDate is Tomorrow

ELSE

SELECT *
FROM table
WHERE MailDate is Today

This is MS SQL. If you want to do more then just one command/select inside the if you do BEGIN .... END.