Search results
8 mar 2016 · The main issue is that the inner query cannot be related to your where clause on the outer update statement, because the where filter applies first to the table being updated before the inner subquery even executes. The typical way to handle a situation like this is a multi-table update.
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.
30 lip 2020 · Like SELECT, the UPDATE statement can have a subquery in several places or clauses. In an UPDATE , the two clauses in which subqueries are used most commonly are SET and WHERE . The SET clause is where we define the new value for the column being modified by the UPDATE .
6 paź 2021 · Try joining the subquery (which I've modified) to the UPDATE statement: UPDATE lty_prd_u_cost a LEFT JOIN ( SELECT PUC_PRD_NAME, PUC_AVG_UCOST FROM ( SELECT PUC_PRD_NAME, PUC_AVG_UCOST ,row_number() over (partition by PUC_PRD_NAME order by PUC_DATE desc) as rn FROM lty_prd_u_cost ) b0 WHERE b0.rn = 1 ) b ON a.PUC_PRD_NAME = b.PUC_PRD_NAME SET a ...
18 mar 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.
UPDATE Taxonomy t JOIN CategoryMapping cm ON cm.language_ID = t.oldID JOIN TaxonomyMapping a ON a.oldID = cm.en_id SET t.sourceId = a.id WHERE t.id > -1; In fact, it seems like you could even do it without a permanent copy.
1 lis 2023 · To update a MySQL query based on a select query, you can use the UPDATE statement with a subquery. This allows you to update rows in one table based on the values returned from a select query on another table.
