Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
INSERT not as maintainable?
Message
De
26/07/2006 16:56:32
Mike Yearwood
Toronto, Ontario, Canada
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01140411
Message ID:
01140461
Vues:
16
>APPEND BLANK updates all the index tags with blank values. Your replace then updates them *again*.
>
>INSERT only writes the single value.

Hi Dan!

I included this performance issue in my mind when I said "Besides the advantages of doing the equivalent of an append blank and a replace all at the same time"

:)

>
>In a loop, the performance difference can be dramatic.
>
>Dan
>
>>Is it just me or is
>>
>>REPLACE ;
>> field1 with expression1, ;
>> field2 with expression2 ;
>> field3 with expression3 ;
>> IN alias
>>
>>You can't get the fields out of synch with the values.
>>
>>Easier to read/maintain/modify than:
>>
>>INSERT INTO alias ;
>> (field1, ;
>> field2, ;
>> field3) ;
>> VALUES ;
>> (expression1, ;
>> expression2, ;
>> expression3)
>>
>>If the field list gets out of synch with the values, that's going to be messy. Not only that, but with a longer list of fields, the chances of error goes up.
>>
>>Besides the advantages of doing the equivalent of an append blank and a replace all at the same time AND SQL compatibility, what other benefits are there to INSERT in VFP?
Précédent
Répondre
Fil
Voir

Click here to load this message in the networking platform