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The title of this thread asks how a subquery can be used in an update. Here's an example of that: update [dbName].[dbo].[MyTable] set MyColumn = 1 where ( select count(*) from [dbName].[dbo].[MyTable] mt2 where mt2.ID > [dbName].[dbo].[MyTable].ID and mt2.Category = [dbName].[dbo].[MyTable].Category ) > 0
30 lip 2020 · Do you find subqueries useful in SELECT? Learn how to use them in INSERT, UPDATE, and DELETE and see how powerful your SQL queries can be.
4 sie 2024 · 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.
12 sie 2024 · Here’s an example that works in SQL Server: UPDATE c SET c.total_orders = subquery.order_count, c.total_spend = subquery.total_spend FROM customers c INNER JOIN ( SELECT customer_id, COUNT(*) as order_count, SUM(order_total) as total_spend FROM orders GROUP BY customer_id ) subquery ON c.customer_id = subquery.customer_id;
2 cze 2023 · 5 – Update with Subquery. Works with: Oracle, SQL Server, MySQL, PostgreSQL. Another way to update a table based on a Select query from another table is to use a subquery. UPDATE person SET account_number = ( SELECT account_number FROM account WHERE account.person_id = person.person_id );
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 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 ...
