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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.
Some useful syntax reminders for SQL Injection into Oracle databases… This post is part of a series of SQL Injection Cheat Sheets. In this series, I’ve endevoured to tabulate the data to make it easier to read and to use the same table for for each database backend.
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.
4 Αυγ 2023 · Direct join syntax is unsupported in Oracle Database; use a correlated subquery to fetch the values instead. For example: update nashvillehousing a set propertyaddress = ( select nvl2(a.propertyaddress, b.propertyaddress,b.propertyaddress) from nashvillehousing b where a.parcelid = b.parcelid and a.uniqueid_ != b.uniqueid_ ) where a ...
26 Απρ 2017 · Ma0. 101 1 1 4. You should update the question with your database platform & version. UPDATE syntax varies slightly between RDBMSs. – AMtwo. Apr 26, 2017 at 13:40. Add a comment.
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.
17 Απρ 2012 · If you need to use a subquery to perform the UPDATE you can do it this way: UPDATE t1 SET t1.value = t2.value FROM Table1 t1 JOIN ( SELECT id, value FROM table2 ) t2 ON t1.id = t2.id
