UPDATE summary_data SET current_category = (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id) WHERE EXISTS (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id); If you want to test your skills using the SQL UPDATE statement, try some of our practice exercises.
These exercises allow you to try out your skills with the UPDATE statement.
You can wrap your around your more than one UPDATE statement in a single transaction, this way if one or more statement fails, the entire transaction rolls back.
Sometimes, solutions are easier than thought, and I believe this is the case.
There are some questions where the answer is no and that is totally fine.
In this article, we are going to look at four scenarios for Oracle cross table update. Category_ID) where exists ( select * from Categories b where b. These columns uniquely identify a record in a table.
Suppose we have two tables Categories and Categories_Test. The common column in the two tables is CATEGORY_ID. Please note that query below is used for illustration purpose because Category_ID alone is primary key.
ORG_ID = @ORG_ID COMMIT BEGIN TRANSACTION is not the same as BEGIN which starts a block ( used in IF for example).