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Creating a compound index with a descending portion
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9
OS:
Windows XP SP2
Database:
Visual FoxPro
Divers
Thread ID:
01053896
Message ID:
01053906
Vues:
28
This message has been marked as a message which has helped to the initial question of the thread.
>I have an application that needs a compound index built. The fields are all string fields, but the user would like the second field to be in descending order. Is there a good way to do this in VFP?
>
>TIA

How long is this field and what kind of information is in it? Are they only ASCII chars from A to Z? If so you may try
str = 'ABC'
NewStr = CHR(155-ASC(SUBSTR(upper(str),1,1)))+CHR(155-ASC(SUBSTR(upper(str),2,1)))+CHR(155-ASC(SUBSTR(upper(str),3,1)))

but this looks like a very complicated solution. I'm sure there is more elegant using bitshift operations...
If it's not broken, fix it until it is.


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