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Use a case statement: select id, case report.type when 'P' then amount when 'N' then -amount end as amount from `report`
10 mar 2024 · This tutorial explains the usage of MySQL IF and IF ELSE Statements in Select queries or functions with syntax and practical examples.
Definition and Usage. The IF () function returns a value if a condition is TRUE, or another value if a condition is FALSE. Syntax. IF (condition, value_if_true, value_if_false) Parameter Values. Technical Details. More Examples. Example. Return 5 if the condition is TRUE, or 10 if the condition is FALSE: SELECT IF(500<1000, 5, 10);
11 lip 2024 · The IF () function in MySQL is a powerful tool that allows you to implement conditional logic directly within your SQL queries. It takes three parameters: a condition to evaluate, a value to return if the condition is true, and a value to return if the condition is false.
Let’s practice with several examples to see how the MySQL IF function works. A simple IF function example. You can use the IF function directly in the SELECT statement without the FROM and other clauses as follows: SELECT IF (1 = 2, 'true', 'false'); -- false Code language: SQL (Structured Query Language) (sql) Try It Out
Use IF...THEN statement to conditionally execute a block of statements based on the evaluation of a specified condition. Use IF...THEN...ELSE statement to execute a block of statements if a specified condition is true and an alternative block of statements if the condition is false.
15 wrz 2008 · THEN 1. ELSE 0. END AS bit) as Saleable, * FROM Product. You only need to use the CAST operator if you want the result as a Boolean value. If you are happy with an int, this works: SELECT CASE. WHEN Obsolete = 'N' or InStock = 'Y' THEN 1. ELSE 0. END as Saleable, * FROM Product.
