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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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4 Νοε 2011 · However, more generally, you can nest CASE expressions, which would look something like this: CASE WHEN m.sign_date IS NOT NULL THEN 'COMPLETED' ELSE CASE WHEN m.start_date IS NOT NULL THEN 'IN PROGRESS' ELSE 'NOT STARTED' END END
2 Δεκ 2016 · The case expression is a flexible and effective way of adding conditional logic into a SQL statement. It can often server a function similar to an If/Else construct in other languages.
2 Νοε 2023 · As we move through the tutorial, we will learn how to integrate SQL CASE within SELECT statements to produce dynamic results, and how to use it within WHERE clauses to filter data conditionally.
20 Απρ 2021 · ELSE statements into your Microsoft SQL Server T-SQL code. CASE is used within a SQL statement, such as SELECT or UPDATE. Don’t mistake CASE for the IF ELSE control of flow construct, which is used to evaluate the conditional execution of SQL statements. Let’s illustrate with an example.
12 Σεπ 2018 · The Case statement in SQL is mostly used in a case with equality expressions. The SQL Case statement is usually inside of a Select list to alter the output. What it does is evaluates a list of conditions and returns one of the multiple possible result expressions.
2 Ιουν 2023 · The SQL CASE statement allows you to perform IF-THEN-ELSE functionality within an SQL statement. Learn more about this powerful statement in this article. This article applies to Oracle, SQL Server, MySQL, and PostgreSQL.
