How to validate more than one element.

Hi guys,.

I can't create a composite primary key. I need to validate elements in a form at once (P1_Project, P1_unit_type, P1_unit_number)
If in the comic book, there is a folder that contains the same data (project, unit_number, unit_type), then the validation should prevent me to create the new record.

I hope my question is clear.
Kind regards
Fateh

Fateh,

Unless you take care of the old data that prevents you from creating a unique index on those columns, I would do so to make sure that you don't get wrong data. For this control in the application that you want to make an there is no validation that looks like the following:

select 1
  from 
 where project     = :PXX_PROJECT
   and unit_number = :PXX_UNIT_NUMBER
   and unit_type   = :PXX_UNIT_TYPE

Validation has to be does not exist because that to succeed the validation to a record cannot contain the same values for these columns.

See you soon,.
Janet Tyson

Tags: Database

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