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IF(type = 'P', amount, amount * -1) as amount. See https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html. Additionally, you could handle when the condition is null. In the case of a null amount: IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount.
1 cze 2022 · In this article, we will explain the diversities of MySQL IF function and MySQL IF statement and show their usage examples. Also, we will review other MySQL functions.
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.
Example. Return "YES" if the condition is TRUE, or "NO" if the condition is FALSE: SELECT IF(500<1000, "YES", "NO"); Try it Yourself » 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.
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.
11 lip 2024 · SELECT IF (1 > 3, 'true', 'false'); -- The IF function checks if the condition '1 > 3' is true; if it is, it returns 'true', otherwise it returns 'false'. Explanation: The SELECT statement is used to evaluate expressions and return the result.
The MySQL IF function is a control flow function that allows you to perform conditional logic within a query. It is commonly used in SELECT statements to return different values based on a specified condition. Syntax. The syntax for the MySQL IF function is as follows: IF(condition, value_if_true, value_if_false)
