Minus vs Except Difference in ORACLE/SQL Server

Question

MINUS is a SQL set operation that selects elements from the first table and then removes rows that are also returned by the second SELECT statement in Oracle. And in SQL Ser

Answer 1

This will check for any result set from the first query, then run the except if there is a result. If not it only runs the second query.

IF EXISTS (SELECT NULL
           FROM ... 
           WHERE ...)
BEGIN
    SELECT ... 
    EXCEPT 
    SELECT ... 
END
ELSE
SELECT ...