Now that the definition of the columns for this result?

I have a table with two columns. A column is a column HolidayCode and varies from H1 - H20, the next column is the column DateDeparted.

The rules, which I want to apply are that you can't have the same HolCode with the same DateDeparted, for example H1 - October 12, 2001, H1-12-Oct-2001.

However the same HolCode can be used with a different date, and the same date can be used with different HolCode.

How it is after a single entry and cannot be entered again?

Thanks for your help!

Create [url http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/clauses002.htm#SQLRF01111] composite unique key on the columns.

Tags: Database

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