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Scan or Select, then scan
Message
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28/01/2002 10:57:56
 
 
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Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Scan or Select, then scan
Divers
Thread ID:
00611587
Message ID:
00611587
Vues:
55
Hi

Can anyone tell me if there is much difference here.

Example 1:
SELECT Table
SCAN FOR Ref = lcRef
     lnRecNo = RECNO()
     SCATTER MEMVAR
     m.Ref = lcNewRef
     INSERT INTO Table FROM MEMVAR
     GO lnRecNo
ENDSCAN
Example 2:
SELECT *;
  FROM Table;
 WHERE Ref = lcRef;
  INTO CURSOR Updates

SELECT Updates
SCAN
     SCATTER MEMVAR
     m.Ref = lcNewRef
     INSERT INTO Table FROM MEMVAR
ENDSCAN
The reason I'm asking is because "Table" is going to grow rapidly when live and this will be accessed on a Server.

What I'm trying to avoid is all the record hopping in the 1st example, but I may be wrong in my 2nd solution, could someone let me know if there's much difference.

Thanks
Kev
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