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all you should do is just join the tables like this. UPDATE table2 t2. JOIN table1 t1 ON t1.id = t2.id. SET t2.name = t1.name; RESULTS WITH JOIN. if you are set on doing it with a select you could do it like this. UPDATE table2 t2, ( SELECT Name, id . FROM table1 . ) t1. SET t2.name = t1.name. WHERE t1.id = t2.id. RESULTS FROM SELECT.
8 mar 2016 · UPDATE target AS t INNER JOIN ( SELECT s.id, COUNT(*) AS count FROM source_grouped AS s -- WHERE s.custom_condition IS (true) GROUP BY s.id ) AS aggregate ON aggregate.id = t.id SET t.count = aggregate.count
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.
First, specify the table that you want to update after the UPDATE keyword (T1). Second, use either INNER JOIN or LEFT JOIN and a join predicate. The JOIN clause must appear right after the UPDATE clause. Third, assign new values to the columns of the T1 table that you want to update data.
1 lis 2023 · How to Update Records in MySQL with a Select Query. By squashlabs, Last Updated: November 1, 2023. Approach 1: Using a Subquery. Approach 2: Using JOIN. Best Practices. To update a MySQL query based on a select query, you can use the UPDATE statement with a subquery.
10 kwi 2019 · I am trying to update the values of a column to the results of a sub query. I get the error that the sub query is returning more that one row, which it should. It should be returning a column of va...
9 sty 2024 · MySQL UPDATE with JOIN allows you to update a table based on data from another table or tables. You can join multiple tables using the JOIN keyword and use the SET clause to specify the columns to update and the values to set.
