Oh, Joy! More JOINs!

JOINing Tables in INSERT, UPDATE, and DELETE Queries

Aug 17, 2007
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Submitted By: Justin Stanley
Filed Under:

• MS SQL
• MySQL
• Oracle
• PostgreSQL

In our last SQL post, we talked about the three basic types of JOINs enterprising young SQL junkies might use to gather data from different tables in their databases.

"Enterprising..." Oh, how I crack myself up some times. Seriously. Don't make me explain why that's funny.

Anyway, in between Star Trek-related examples, we blabbed on and on about INNER JOINs, three kinds of OUTER JOINs, and the almost completely useless CROSS JOIN. You might remember, though, that every one of those brilliant examples involved querying existing data with SELECT statements. T...

JOIN the Dark Side

Aug 14, 2007
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Submitted By: Justin Stanley
Filed Under:

• MS SQL
• MySQL
• Oracle
• PostgreSQL

When you've been playing around with SQL for awhile, you start to take your knowledge of JOINs for granted. When someone asks you about JOINing data from two or more tables together, you get this stunned look on your face... You know, the same one you get when you actually hear someone mutter the words "I've never seen 'Star Wars'." You forget that you, too, once didn't know a JOIN from a Jedi, and that everyone has to start somewhere.

So let's talk about JOINs. Like the name implies, a JOIN is simply a method for connecting two tables in a database, usually through so...