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  1. stackoverflow.com › questions › 10359534sql - MySQL UPDATE with SUBQUERY of same table - Stack Overflow

    9 lis 2015 · Through phpMyAdmin I need to make global updates to some tables, specifically I want to update all FieldValue entries to "United States of America" with the FieldName "country" that have the same FormID as the FieldName "city" and the FieldValue "Houston".

  2. stackoverflow.com › questions › 11588710sql - mysql update query with sub query - Stack Overflow

    8 mar 2016 · The typical way to handle a situation like this is a multi-table update. Update Competition as C inner join ( select CompetitionId, count(*) as NumberOfTeams from PicksPoints as p where UserCompetitionID is not NULL group by CompetitionID ) as A on C.CompetitionID = A.CompetitionID set C.NumberOfTeams = A.NumberOfTeams

  3. 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.

  4. database.guide › using-update-with-a-subquery-in-sqlUsing UPDATE with a Subquery in SQL - Database.Guide

    4 sie 2024 · Using UPDATE with a Subquery in SQL. Posted on August 4, 2024 by Ian. Ever found yourself needing to update a bunch of rows in your database, but the condition for the update depends on data from another table? That’s where UPDATE with a subquery comes in handy. Let’s break it down.

  5. dba.stackexchange.com › questions › 50981Mysql: update query with subquery - Database Administrators Stack...

    SET t.sourceId = a.id. WHERE t.id > -1; However, if your "TaxonomyMapping" and "Taxonomy" tables are an "exact copy" (containing the same data) then table "ta" is not necessary, and all you actually need is this: UPDATE Taxonomy t.

  6. www.mysqltutorial.org › mysql-basics › mysql-subqueryMySQL Subquery - MySQL Tutorial

    A MySQL subquery is a query nested within another query such as SELECT, INSERT, UPDATE or DELETE. Also, a subquery can be nested within another subquery. A MySQL subquery is called an inner query whereas the query that contains the subquery is called an outer query.

  7. dev.mysql.com › doc › refmanMySQL :: MySQL 8.4 Reference Manual :: 15.2.17 UPDATE Statement

    You cannot update a table and select directly from the same table in a subquery. You can work around this by using a multi-table update in which one of the tables is derived from the table that you actually wish to update, and referring to the derived table using an alias.

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