Mysql update using join example

Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy. Copyright by Refsnes Data. All Rights Reserved. Add a comment. Active Oldest Votes. It is mostly syntactic sugar, but a couple differences are noteworthy: ON is the more general of the two.

City JOIN world. Country ON City. Improve this answer. K-Gun Shlomi Noach Shlomi Noach 8, 1 1 gold badge 20 20 silver badges 20 20 bronze badges. I'm curious about performance differences, if any. Actually, both interpret to plain old Theta-style. Granted this may be a relative corner case. Worth putting out there though Tom Mac Tom Mac 9, 3 3 gold badges 23 23 silver badges 34 34 bronze badges.

Extremely good point. Plus towns called 'E' — Roemer. It is all possible and sometimes highly effective. Wikipedia has the following information about USING : The USING construct is more than mere syntactic sugar, however, since the result set differs from the result set of the version with the explicit predicate.

Tables that it was talking about: The Postgres documentation also defines them pretty well: The ON clause is the most general kind of join condition: it takes a Boolean value expression of the same kind as is used in a WHERE clause.

Steve Chambers Robert Rocha Robert Rocha 9, 17 17 gold badges 64 64 silver badges bronze badges. Conclusion If the database schema is designed so that Foreign Key column names match the columns they reference, and the JOIN conditions only check if the Foreign Key column value is equal to the value of its mirroring column in the other table, then you can employ the USING clause.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 8 years, 10 months ago. Active 12 days ago. Viewed k times. I asked a question and got this reply which helped. Do I do the following?

Improve this question. Peter Mortensen Ricky Ricky 5, 4 4 gold badges 18 18 silver badges 22 22 bronze badges. Sure it is possible. Improve this question. Aaron Silverman Aaron Silverman You need to put the SET b. See stackoverflow. This example has SET after the from, and that examples updates the first table in the join order. I would like to update a table in the middle of the join order.

That shouldn't matter. Add a comment. Active Oldest Votes. Improve this answer. Bill Karwin Bill Karwin k 82 82 gold badges silver badges bronze badges. This was the only answer I came across in a lot of searching that gave a clear answer and explained how and why it is different from other SQL languages. Andreas Wederbrand Andreas Wederbrand That syntax doesn't work.