0 - 2 of 2 tags for between dates

I want to add a selection criteria to my SQL.  The user will select a 'from' and 'to' date, e.g., 11/1/2015 and 12/31/2015.  The date column (jsdate) in the table is Decimal (8,0).  When I look at the dates in this column it looks like 20,150,612, 20,150,609, 20,150,611, etc.  I'm trying to add a selection critieria like "and cast(jsdate as date format 'm

All of our tables have effective start and end date columns (EFF_STRT_DT, EFF_END_DT).  We want to create date partitions on some of our larger tables, and our fist instinct is to create the partition on EFF_END_DT, because we set that date to '9999-21-31' to represent "active" rows in our data warehouse.