how to combine each record into a range?
Table1
Day Value
1 0
2 0
3 0
4 1
5 1
6 1
7 0
8 0
9 0
10 0
11 1
12 1
13 0
14 1
15 0
16 0
17 1
18 1
19 0
20 1
.. .
.. .
.. .
1000 1

how to covert the above table into:
DayStart DayEnd Value
1 3 0
4 6 1
7 10 0
11 12 1
13 13 0
14 14 1
15 16 0
17 18 1
19 19 0
....

thanks,

pemt