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  1. stackoverflow.com › questions › 2177543MySQL - Using If Then Else in MySQL UPDATE or SELECT Queries

    1 lut 2010 · Here's a query to update a table based on a comparison of another table. If record is not found in tableB, it will update the "active" value to "n". If it's found, will set the value to NULL. UPDATE tableA LEFT JOIN tableB ON tableA.id = tableB.id SET active = IF(tableB.id IS NULL, 'n', NULL)"; Hope this helps someone else.

  2. www.geeksforgeeks.org › mysql-if-if-then-if-then-else-and-if-then-elseif-elseIF, IF-THEN, IF-THEN-ELSE and IF-THEN-ELSEIF-ELSE Statement -...

    21 sie 2024 · The IF-THEN statement in SQL is used to execute a block of code if a specified condition is true. If the condition evaluates to true, the code within the THEN block is executed. If the condition is false, the block is skipped. Syntax: IF condition THEN . statements; END IF; Parameters Used:

  3. dirask.com › posts › MySQL-UPDATE-query-with-IF-condition-conditional-update-pOv4JDMySQL - UPDATE query with IF condition (conditional update)

    In this article, we would like to show you UPDATE query with IF condition in MySQL. Quick solution: UPDATE `table_name` SET `column_name` = IF(condition , if_true, if_false); Practical example. To show UPDATE query with IF condition, we will use the following users table:

  4. www.freecodecamp.org › news › sql-update-statement-example-queries-for-updatingSQL Update Statement — Example Queries for Updating Table Values

    26 kwi 2020 · The UPDATE statement can be used to update a single column, a larger set of records (through the use of conditions), and/or the entire table in a database. The condition(s) can be a boolean, a string check, or mathematical sequence that resolves to a boolean (greater than, less than, etc.).

  5. www.w3schools.com › mysql › mysql_updateMySQL UPDATE Statement - W3Schools

    The MySQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name. SET column1 = value1, column2 = value2, ... WHERE condition; Note: Be careful when updating records in a table! Notice the . WHERE clause in the UPDATE statement.

  6. www.w3schools.com › mysql › func_mysql_ifMySQL IF() Function - W3Schools

    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);

  7. dba.stackexchange.com › questions › 305706MySQL - Update column based on multiple conditions

    6 sty 2022 · You have two possibilities to do what you want - one works for versions of MySQL from 5.5 (uses aggregates) and upwards and the other works for MySQL 8 and up (uses window functions). All of the code below is available on the fiddle here .

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