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13 Ιουν 2021 · Here are the CASE expression examples from the PostgreSQL docs (Postgres follows the SQL standard here): SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 THEN 'two' ELSE 'other' END FROM test; or. SELECT a, CASE a WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'other' END FROM test;
7 Μαΐ 2017 · The simple way to achieve this goal is to add a CASE expression to your SELECT statement. In this article, we'll introduce you to the syntax, formats, and uses of the CASE expression. The CASE expression is a conditional expression: it evaluates data and returns a result.
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.
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. Table of Contents. What Does the SQL CASE Statement Do? SQL CASE Statement Syntax. Parameters of the CASE Statement.
28 Ιουν 2023 · SQL case statements are a versatile and powerful tool in the database programmer’s arsenal. They provide a method for performing conditional expressions within SQL queries and stored procedures. With case statements, users can evaluate conditions and return a value or perform different actions based on the result of the evaluation.
1 Απρ 2019 · The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. It can be used in the Insert statement as well. In this article, we would explore the CASE statement and its various use cases.
Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. The CASE expression evaluates a list of conditions and returns one of the multiple possible results. You can use a CASE expression in any statement or clause that accepts a valid expression.
