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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`
The IFNULL function returns a string or a numeric based on the context where it is used. If you want to return a value based on TRUE or FALSE condition other than NULL, you should use the IF function. MySQL IFNULL function examples. See the following IFNULL function examples: SELECT IFNULL (1, 0); -- returns 1 Code language: SQL (Structured ...
11 lip 2024 · The following MySQL statement returns the book name, ISBN number, and a column alias "Page / Price" from the book_mast table. This column will display "Pages: [no_page]" if the number of English books is greater than the number of non-English books; otherwise, it will display "Price: [book_price]".
Use IF...THEN...ELSEIF...ELSE statement to evaluate multiple conditions sequentially and execute corresponding blocks of statements based on the first true condition, with an optional block of statements to execute if none of the conditions is true.
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.
15 gru 2012 · I found a bug in MySQL 5.1.72 when using the nested if() functions .... the value of column variables (e.g. qty_1) is blank inside the second if(), rendering it useless. Use the following construct instead:
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.
