uniqueidentifier

Identity Crisis

Methods For Converting a Stored Procedure

An interesting use of T-SQL to run a stored procedure as part of a SELECT statement to get a result set to be used and combined with other tables. From Eli Leiba, learn how you can build a stored procedure into your queries.

Ceiling, Floor and Round!

DateTime Trick

GETDATE

File Groups

Causation, Correlation and Crackpots

Joe Celko explores the dangers of muddling correlation and causation, emphasises the importance of determining how likely it is that a correlation has occurred by chance, and gets stuck into calculating correlation coefficients in SQL. Along the way, Joe illustrates the consequences of leaping to the wrong conclusion from correlations with tales of Pop Dread.

Varchar or Char?

AND & OR