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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. If no conditions are true, it returns the value in the ELSE clause.
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13 Ιουν 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). – Paul Maxwell. Dec 22, 2017 at 1:13.
The SQL CASE expression allows you to evaluate a list of conditions and returns one of the possible results. The CASE expression has two formats: simple CASE and searched CASE. You can use the CASE expression in a clause or statement that allows a valid expression.
22 Αυγ 2024 · The CASE statement in SQL is a conditional expression that allows you to execute different logic based on certain conditions within a query. It is used to create new columns, customize values, or modify query outputs depending on specified criteria.
What is a SQL CASE Expression? The CASE expression in SQL is a conditional expression, similar to “if…else” statements found in other programming languages. It allows us to perform conditional logic in our SQL queries, where you can change the data that is returned based on specific conditions.
2 Ιουν 2023 · SQL CASE Statement Syntax. The syntax of the SQL CASE expression is: CASE [expression] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 ... WHEN condition_n THEN result_n ELSE result END case_name. The CASE statement can be written in a few ways, so let’s take a look at these parameters. Parameters of the CASE Statement
3 Σεπ 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.
