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05-Dec-2019 06:03

updating multiple tables in oracle-52

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Here is a simple update: And, of course remember to commit.

I work a lot with Data Warehouse data, where we many times have duplicate data for speed purposes, etc.

And, some times, rater than using a ginormous INSERT or UPDATE statement, I actually build the records first with mostly empty columns, and then fill in a few columns at the time.

A couple of examples of when I do this is that I built a dynamic contest framework for my company, and also a Commission Calculator for recalculation of commission.

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.

updating multiple tables in oracle-57

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Actually, if you mess up on the WHERE line in the last query, you will end up getting the following error message: “ TJ Abrahamsen is the founder and author of Oracle Coder. His expertise is with Oracle SQL, PL/SQL, and the latest years Java against Oracle databases.He loves teaching others, and like to share his thoughts, ideas, and experience on his blog.



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