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sum a column according to a previous row in the report [message #268073]

Mon, 17 September 2007 07:54

emadbsb
Messages: 334
Registered: May 2005
Location: egypt

Senior Member

hii all

suppose i have this rows generated in a report

a b
5 8
10 12
8 20

i put any values for b as "b" should be equal to
a in the current row + b in the previous row

so that the result should be like this

a b
5 5
10 15 ====>(10+5)
8 23 ====>(8+15)

how can i do this in a report

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Re: sum a column according to a previous row in the report [message #268087 is a reply to message #268073]

Mon, 17 September 2007 08:51

vamsi kasina
Messages: 2112
Registered: October 2003
Location: Cincinnati, OH

Senior Member

Search for Analytical functions (LAG).

By
Vamsi

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Re: sum a column according to a previous row in the report [message #268120 is a reply to message #268087]

Mon, 17 September 2007 10:33

Soumen Kamilya
Messages: 128
Registered: August 2007
Location: Kolkata

Senior Member

select a, a+ nvl(lag(b) over(order by a),0) as b from <table_name>

Cheers
Soumen

[Updated on: Mon, 17 September 2007 10:39]

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