What are the basic rules to be followed when you are using SQL SET Operators? Posted in SQL Interview Questions by Chandrasekhar Raparthi On July 10, 2014. No comments Rules: Number of columns in all the result sets should be matched(same). Respective data types should be matched between all the result sets. Share this:GooglePinterestEmailTwitterLinkedInFacebook Tags:set operators,SQL Related Posts Itz Puzzle tym Try to guess the Answers for the below Queries What are Global variables in SQL Server and how to create them? In SQL Server, there is NO concept of Global How do you generate the sequence of dates from one date to other? This is possible through Recursive CTEs. You can execute Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.