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case statement

bnjutkJun 16 2009 — edited Nov 6 2010
hi
I have data like this in the table

date value
1-MAY-09 20
2-MAY-09 30
3-MAY-09 40
4-MAY-09 50
5-MAY-09 60
1-JUN-09 70
2-JUN-09 80
3-JUN-09 90
4-JUN-09 10
5-JUN-09 60

i want to have like this with a query

date value value_last_month
1-MAY-09 20
2-MAY-09 30
3-MAY-09 40
4-MAY-09 50
5-MAY-09 60
1-JUN-09 70 20
2-JUN-09 80 30
3-JUN-09 90 40
4-JUN-09 10 50
5-JUN-09 60 60

i mean in third column i want to get the value of same date lastmonth
can any one help me out?


thanks
balaji

Edited by: chinnu on Jun 16, 2009 2:51 AM

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Locked on Jul 15 2009
Added on Jun 16 2009
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