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If you want to update specific rows (ie where the IDs match) you probably want to do a coordinated subquery. However, since you are using Oracle, it might be easier to create a materialized view for your query table and let Oracle's transaction mechanism handle the details.
Subquery Method. The first option is to do an update of the DEST_TAB table using a subquery to pull the correct data from the SOURCE_TAB table. Notice the EXISTS predicate to exclude rows from the DEST_TAB table with no matching row in the SOURCE_TAB table.
6 Δεκ 2017 · Learn about several methods to update data using subqueries in UPDATE statements to make them more effective and easier to maintain in Oracle SQL.
4 Αυγ 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.
23 Δεκ 2015 · We have a query that updates a column for all rows matching a condition which involves a subselect on said column, like the following: update CE_WORKSET_READ_ENTRY workset. set workSet.MARK = 0, workSet.SELECTABLE = 0. where workSet.MARK = 1 and.
2 Ιουν 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 );
9 Ιουν 2023 · Update with Subquery. The UPDATE statement allows you to update data from another table, using a SELECT statement. The syntax for this is: UPDATE tablename. SET column = (SELECT query) [WHERE condition];
