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MySQL join four tables!

intersection, join, mysql, programming

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# 8  
Old 01-24-2012
Originally Posted by yifangt
Then the output should be:
B1 A1 O
B5 A1 O

If you extend this requirement to the 4 tables and the original data in them, then your query in your first post is correct.
You should see 14 records as per your expectation here.

# 9  
Old 01-25-2012
Thanks a lot, Tyler! I thought so now and really appreciate your input.
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