RE: Incrementing a count within a file by using SQL

Why not a simple subquery to return the current max for RecType / Part
key pairs....

Update xyz1234 a set linenbr = (select max(linenbr) from xyz1234 s where
s.rectype=a.rectype and s.partnum=a.partnum) + 1
Where linenbr = 0


-Eric

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Shore
Sent: Thursday, July 16, 2009 12:52 PM
To: Midrange Systems Technical Discussion
Subject: Incrementing a count within a file by using SQL

Afternoon all
I have a quandary that I'm hoping someone knows an answer to

I have a file
The file consists of 3 fields
Record type
Part number
Line number

For example, the data in this file is
Record type Part number Line number
H 0000000001 00000
S 0000000001 00000
D 0000000001 00000
D 0000000001 00000
A 0000000001 00000
C 0000000001 00000
M 0000000001 00000
H 0000000002 00000
S 0000000002 00000
D 0000000002 00000
H 0000000003 00000
S 0000000003 00000
D 0000000003 00000
D 0000000003 00000
D 0000000003 00000
D 0000000003 00000

Using SQL, how can I increment the line number in the file so that the
first record of each part number is 00001, but the subsequent records
(for
the same part number) is incremented by 1 for each record
so that the end result is
Record type Part number Line number
H 0000000001 00001
S 0000000001 00002
D 0000000001 00003
D 0000000001 00004
A 0000000001 00005
C 0000000001 00006
M 0000000001 00007
H 0000000002 00001
S 0000000002 00002
D 0000000002 00003
H 0000000003 00001
S 0000000003 00002
D 0000000003 00003
D 0000000003 00004
D 0000000003 00005
D 0000000003 00006
etc



Thanks in anticipation


Alan Shore
Programmer/Analyst, Distribution
E:AShore@xxxxxxxxxxx
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill