' -----------------------------------------------------------------------------
'                                       DTT 1.2.0.4  (c)2008 FSL - FreeSoftLand
'  Title: 04 Functions - Agregate
' 
'  Date : 01/04/2008
'  By   : Juan Pedro
' -----------------------------------------------------------------------------

                              COUNT:      returns the NUMBER OF ROWS that satisfy the condition IN the WHERE clause.
SUM:          returns the SUM OF ALL VALUES IN a COLUMN
AVG:          computes the average OF a COLUMN
MAX:          returns the largest VALUE IN a COLUMN, use MAX
MIN:          returns the lowest member OF a COLUMN
VARIANCE:     returns the square OF the standard deviation
STDDEV:      returns the standard deviation OF a COLUMN OF numbers

