A SQL Query walks into a bar. In one corner of the bar are two tables. The Query walks up to the tables and asks: - Mind if I join you? 

SELECT * FROM [Users]

WHERE [Clue] > 0

No records found.

So, we've had this category in our knowledge base named Best Practices for some time.  However, it's been empty.  Not any more.  Tom has written a few articles and promises more to come. They can be viewed here.