How to use WHERE and HAVING clause in SQL? Example Tutorial

Hello guys, if you want to learn about WHERE and HAVING clause in SQL then you have come to the right place. This blog shall be explaining how to use WHERE and HAVING clauses in SQL. but it won't be fine if we just jump to it. We need a good understanding of what SQL is and what it is used for. SQL stands for structured queried language, as it sounds it is a language or syntax that is used to query the database.

What are T-SQL window functions? How to use it and Performance Analysis

What are T-SQL window functions?

 T-SQL window functions make creating a lot of queries easier, and they typically outperform previous approaches. Using the LAG function, for example, is far superior to doing a self-join. To improve overall performance, you must first comprehend the notion of framing and how window functions rely on sorting to provide results.