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  1. stackoverflow.com › questions › 17265522sql - Conditional UPDATE in MySQL - Stack Overflow

    23 cze 2013 · SELECT *. FROM relation. WHERE (userid1 = 3 AND userid2 = 4) OR (userid1 = 4 AND userid2 = 3); Output: 4 | 3 | bill | jack. and I want to change the name of the user 3 in the relation between 3 and 4, but I don't know if it is the userid1 or the userid2. I thought of case: UPDATE relation.

  2. 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.

  3. dev.mysql.com › doc › mysqlMySQL :: MySQL 8.4 Reference Manual :: 15.2.17 UPDATE Statement

    The WHERE clause, if given, specifies the conditions that identify which rows to update. With no WHERE clause, all rows are updated. If the ORDER BY clause is specified, the rows are updated in the order that is specified. The LIMIT clause places a limit on the number of rows that can be updated.

  4. www.mysqltutorial.org › mysql-basics › mysql-updateMySQL UPDATE - MySQL Tutorial

    ... [WHERE . condition]; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the table that you want to update data after the UPDATE keyword. Second, specify which column you want to update and the new value in the SET clause.

  5. 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:

  6. www.geeksforgeeks.org › mysql-update-statementMySQL UPDATE Statement - GeeksforGeeks

    12 cze 2024 · The UPDATE statement in MySQL is essential for modifying existing data in a table. It's commonly used to correct errors, update values, and make other necessary changes. This article explores the structure and use cases of the UPDATE statement, with clear and concise real-life examples.

  7. www.geeksforgeeks.org › how-to-update-table-rows-in-mysql-using-subqueryHow to Update Table Rows Using Subquery in MySQL - GeeksforGeeks

    26 cze 2024 · Updating table rows using subqueries in MySQL enables precise modifications based on specific conditions or values from other tables. This technique leverages subqueries within the SET or WHERE clauses of the UPDATE statement, allowing dynamic and context-specific updates.

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