Coalesce is also available in Sybase

This functions evaluates the listed expressions and returns the first non-null value. If all the expressions are null, coalesce returns null

USAGE: coalesce(expression, expression [, expression]...)

EXAMPLE: coalesce(initialqty,finalqty,middleqty)

Returns the first occurrence of a non-NULL value in either the initialqty or finalqty or middleqty