Sep 15, 2008 · If you need to write just one condition, then iif() is sufficient, however if you want to write multiple iif() conditions within one statement then you will have to use `case' statement as …

May 28, 2024 · We can use either a CASE statement or an IIF () function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects …

What does the SQL CASE expression do? It iterates over table rows and returns a value for each column. It evaluates conditions and returns a value based on the first true condition. It specifies an …

Nov 18, 2025 · Unless a statement block is used, the IF or ELSE condition can affect the performance of only one Transact-SQL statement. To define a statement block, use the control-of-flow keywords …

Jul 23, 2025 · By using IF...ELSE within SQL statements we can categorize data, apply conditional transformations, and implement business logic directly in our queries. In this article, We will explain …

This is most easily accomplished in all versions of SQL Server using the CASE statement, which acts as a logical IF...THEN...ELSE expression and returns various values depending on the result.

Sep 12, 2022 · Learn how to build conditional logic when writing T-SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.