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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 › php-mysql-update-queryPHP | MySQL UPDATE Query - GeeksforGeeks

    1 sie 2021 · The MySQL UPDATE query is used to update existing records in a table in a MySQL database. It can be used to update one or more field at the same time. It can be used to specify any condition using the WHERE clause.

  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.geeksforgeeks.org › how-to-update-data-in-mysql-database-table-using-phpHow to Update Data in MySQL Database Table Using PHP?

    22 kwi 2024 · This guide delves into the process of updating data in a MySQL database table using PHP, covering database connection, SQL queries, error handling, and best practices.

  5. 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 · If the condition is false, the block is skipped. Syntax: IF condition THEN . statements; END IF; Parameters Used: condition – It is used to define the condition that will be evaluated. statements – It is a set of SQL statements based upon a pre-defined condition. Example: DELIMITER $$ CREATE PROCEDURE Geekdemo( num1 INT) BEGIN IF num1 ...

  6. www.tutorialrepublic.com › php-tutorial › php-mysql-update-queryHow to Update Data in MySQL Database Table Using PHP - Tutorial...

    UPDATE table_name SET column1=value, column2=value2,... WHERE column_name=some_value. Let's make a SQL query using the UPDATE statement and WHERE clause, after that we will execute this query through passing it to the PHP mysqli_query() function to update the tables records.

  7. stackoverflow.com › questions › 35354923php - MySQL `UPDATE` statement with an `IF` condition - Stack...

    12 lut 2016 · I'm trying to create a MySQL UPDATE statement with an IF condition. I would like to update the user's particulars if the email and username are not duplicate or found in database. I'm stuck with this code: || strtolower(trim($user->username)) == strtolower(trim($user)) //next to condition username.

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