How can charge files text in a Datawarehouse Database???

All the days I receive 20 files to charge to my Datawarehouse Database. The files names are NAMETABLE_YYYYMMDD (ex. SALES_20040511)
In some files, for example to charge the Sales table, I have to join 2 files texts (or charge a Temporal Tables), because the SALES files text don’t have the correct Customer Key and I receive other file text with the Customer Key and the UnifiedCustomerKey appropriate
How can I charge it???
1)     SQL Loader
2)     External tables
3)     Another…
What I the best way???? (I have oracle 9i)
Could you recommend one of them???
Thanks

Unless I misunderstand, you shouldn't need to change the data in the underlying text files. Just map them as external tables and do whatever manipulation, joining, etc is necessary in SQL.
If your file names change, you would have to create new external table definitions. You can certainly do this at runtime with dynamic SQL, just be aware that DDL issues an implicit commit before and after the operation, so you can't create new external tables in a transaction.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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