Many people are confused by various JOIN operations supported by SQL. Learn to master the SQL command line with this crash course in JOIN syntax.

Understand the effects of NULLs on inner and outer JOINs Your email has been sent SQL Server developers must understand two things: the difference between inner and outer JOINs and the effect of NULLs ...

I need to form the equivalent of a Union Join in Oracle 8i, even though a Union Join doesn't appear to be supported in 8i. I might be able to manipulate a Full Outer Join to get the results I need, ...