Get previous column vale till it reaches another not null value - response (83) by VBurmist

Hi Bikky,
 
There is one more option.   Apart from using the Ordered Analytical Functions, you might want to introduce the Start_date and End_date into the LKP table.   This approach would correspond to the design when you have a Fact table, a Lookup table, and the condition for dates is:
 
Fact_table.Event_date between Lookup_table.Start_date and Lookup_table.End_date
 
 
This is useful when these tables are used by many people, not all of them being comfortable with Ordered Analytical Functions (they are really great though).   
 
Regards,
Vlad.