Select statement to join tables?

For a simple join:

SELECT a.*, b.*
FROM tblAlpha a, tblBeta b
WHERE (a.keyfield = b.foreignkey);

It's often smarter to do an outer join, especially if you need rows in tblAlpha to show up in your resultset even if there is no matching record in tblBeta:

SELECT a.*, b.*
FROM tblAlpha a LEFT OUTER JOIN tblBeta b ON a.keyfield = b.foreignkey;

If you want to get into the nuts and bolts of it, the MySQL doc is found at:
http://www.mysql.com/doc/en/JOIN.html

Var dette svaret til hjelp?

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