Re: SQL and a Running/Moving Total

Shouldn't that be:

select a.name, a.year, sum(a.amt + b.amt + c.amt)
from myfile a
inner join myfile b on a.name = b.name and b.year = (a.year + 1)
inner join myfile c on a.name = c.name and c.year = (a.year + 2)
group by a.name, a.year

did you test it? I had a hard time wrapping my head around what would
happen the other way.

Mark Murphy
STAR BASE Consulting, Inc.
mmurphy@xxxxxxxxxxxxxxx



From:
Charles Wilt <charles.wilt@xxxxxxxxx>
To:
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:
10/08/2009 04:01 PM
Subject:
Re: SQL and a Running/Moving Total
Sent by:
midrange-l-bounces@xxxxxxxxxxxx



select a.name, a.year, sum(a.amt + b.amt + c.amt)
from myfile a
inner join myfile b on a.name = b.name and a.year = (b.year + 1)
inner join myfile c on a.name = c.name and a.year = (c.year + 2)
group by a.name, a.year

Performance is not going to be great.
RPG records level access or an SQL cursor may be a better solution.

HTH,
Charles

On Thu, Oct 8, 2009 at 3:40 PM, Mark Allen <scprideandms@xxxxxxxxx> wrote:

Table has 3 columns,Name,year,count and I need a total of the "count"

field

for each name over a 3 yr period, if there are NOT 3 years available

then no

output row.

Example:
Bill 1990 72
Bill 1991 73
Bill 1992 71
Bill 1993 55
Bill 1994 78
Bill 1995 73
Stan 1990 130
Stan 1991 122
Stan 1992 100
Stan 1993 115
Stan 1994 101
Stan 1995 112

What I want from the SQL output is

Bill 1990 216
Bill 1991 199
Bill 1992 204
Bill 1993 206
Stan 1990 352
Stan 1991 337
Stan 1992 316
Stan 1993 328
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