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Need idea for sort
Message
De
26/02/2010 14:31:08
 
 
À
26/02/2010 04:03:06
Lutz Scheffler
Lutz Scheffler Software Ingenieurbüro
Dresden, Allemagne
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01451160
Message ID:
01451312
Vues:
33
>Hi all,
>
>I have I problem sorting records.
>
>I have an alpanumeric structure that should be sortet numerical. It contains digits and alphas in various compositions.
>example
>
>1.1
>1.02
>10.1
>01.3
>1.02.N
>1.02.N.R
>1.10.R
>1.10.R.1
>20DP
>20
>1.02.R
>
>
>The string lenght is limited by field lenght anything else is possible.
>There is a "normal" that means to separate anything by a point but as the example shows sometimes its ignored.
>
>So what I need is to order the stuff numerical.
>
>1.1
>1.02
>1.02.R
>1.02.N
>1.02.N.R
>01.3
>1.10.R
>1.10.R.1
>10.1
>20
>20DP
>
>
>Has somebody done things like this?
>
>TIA
>
>Agnes

Determine deepest structure
Create dummy field that can store surogate key according to structure dept.
Break each string into substring, pad with zeroes on the left and you get your surogate key
(This would be function)
&&From
1.1
1.02
1.02.R
1.02.N
1.02.N.R
01.3
1.10.R
1.10.R.1
10.1
20
20DP

**You create
000.000.001.001
001.002.000.000
001.002.00R.000
001.002.00N.000
.
.
.
Index or order subquery by that surogate field


HTH
Sergio




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Limassol, Cyprus

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