column1 = 1     column2 = 2008-04-16 00:00:00
column1 = 2     column2 = 2008-04-15 00:00:00
column1 = 3     column2 = 2008-04-14 00:00:00
column1 = 4     column2 = 2008-04-13 00:00:00
column1 = 5     column2 = 2008-04-12 00:00:00
column1 = 6     column2 = 2008-04-11 00:00:00
column1 = 7     column2 = 2008-04-10 00:00:00
column1 = 8     column2 = 2008-04-09 00:00:00
column1 = 9     column2 = 2008-04-08 00:00:00
column1 = 10    column2 = 2008-04-07 00:00:00
column1 = 11    column2 = 2008-04-06 00:00:00
column1 = 12    column2 = 2008-04-05 00:00:00
column1 = 13    column2 = 2008-04-04 00:00:00
column1 = 14    column2 = 2008-04-03 00:00:00
column1 = 15    column2 = 2008-04-02 00:00:00
column1 = 16    column2 = 2008-04-01 00:00:00
column1 = 17    column2 = 2008-03-31 00:00:00
column1 = 18    column2 = 2008-03-30 00:00:00
column1 = 19    column2 = 2008-03-29 00:00:00
column1 = 20    column2 = 2008-03-28 00:00:00
column1 = 21    column2 = 2008-03-27 00:00:00
column1 = 22    column2 = 2008-03-26 00:00:00
column1 = 23    column2 = 2008-03-25 00:00:00
column1 = 24    column2 = 2008-03-24 00:00:00
column1 = 25    column2 = 2008-03-23 00:00:00