The SQL CASE Expression. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result.

Mar 26, 2025 · Syntax of the CASE statement. The CASE statement in SQL follows a straightforward structure that resembles conditional statements in programming languages.. It can be implemented in two ways, depending on how conditions are evaluated: Simple CASE. The simple CASE syntax compares an expression to a set of simple expressions sequentially and returns the result of the first match.

Nov 22, 2024 · CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as <select_list>, IN, WHERE, ORDER BY, and HAVING. Transact-SQL syntax conventions. Syntax for SQL Server, Azure SQL Database and Azure Synapse Analytics.

Jun 13, 2021 · case expression is the correct term as they evaluate to a scalar value (also. in SQL a statement is terminated by the "statement terminator" which is the semi-colon). The complete syntax depends on the database engine you're working with: For SQL Server: WHEN when-expression-1 THEN value-1. [ WHEN when-expression-n THEN value-n ...

Jan 16, 2024 · To begin, we will examine the simplest syntax of the SQL CASE WHEN statement. This construct is especially helpful for segmenting records according to a given criteria and generating a new column to show the outcomes. Here’s the syntax: Let's explain each part in detail: SELECT: Specifies the columns to be included in the result set.

Aug 17, 2021 · In SQL, the CASE statement returns results based on the evaluation of certain conditions. It is quite versatile and can be used in different constructs. It's a simple yet powerful way to make your data adapt and respond to various scenarios, making your database queries more dynamic and insightful.

Apr 20, 2021 · In the T-SQL scripting language, you can use the SQL CASE statement to evaluate a condition and return one or more result expressions. This SQL Tutorial will teach you when and how you can use CASE in T-SQL statements. The CASE expression is used to build IF … THEN … ELSE statements into your Microsoft SQL Server T-SQL code.

SQL allows you to use the CASE expression in the places where you can use an expression. For example, you can use the CASE expression in the clauses such as SELECT, ORDER BY, and HAVING of the SELECT, DELETE, and UPDATE statements. Here’s the syntax of the simple CASE expression: WHEN when_expression_1 THEN result_1.

Aug 20, 2024 · There are two main forms of the CASE statement: Simple CASE: Compares an expression to a set of simple expressions to determine the result. Searched CASE: Evaluates a set of Boolean expressions to determine the result. The syntax for a simple CASE statement goes like this: WHEN value1 THEN result1. WHEN value2 THEN result2. ... ELSE default_result.

What is CASE in SQL Server? The CASE expression in SQL server allows us to apply if-then-else logic in a SQL statement. A CASE consists of a number of conditions with an accompanying custom result value in a case body followed by an optional ELSE clause.