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Dealing with history files
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Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00269633
Message ID:
00269900
Vues:
16
I'll give that a shot.

Thanks,

Michelle


>I have the same problem with SBT. I created a VFP database that contains views of the SBT data. For example, lv_armast is a view of the ArMast table, while lv_arymst is a view of the ArYmst table. I use these base views to create views that are UNIONs of the base views. For example, lv_armastunion is a UNION of the lv_armast and lv_arymst views.
>
>>In SBT, for some asinine reason known only to them, they split their data into current and history tables. These tables are identical in structure and just have a slightly different name.
>>
>>The reports I'm writing rely on data that can be either current or historical. So I have to deal with both tables.
>>
>>What I've been doing is using an SQL UNION to join the two tables into a third and working with that. Unfortunately, since the client has cleaned out their data since '94, this process takes forever on my 433. On their 166s, I can imagine it will just scream.
>>
>>Is there a better way to deal with this? The FoxFire reports can handle it without hardly a pause so there must be some way. Not being privy to the ways of FoxFire, I thought I'd ask here.
>>
>>Thanks,
>>
>>Michelle
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