Regarding logical problem plz help me

hi all
i have a table like this
EMPNO NOT NULL NUMBER(4)
HIREDATE DATE
OFF_DAY NUMBER(3)
now what i want is i want to restrict the user with out entering the data in off_day column continuesly for three days
ex
10 22-09-2004 8
10 23-09-2004 8
10 24-09-2004 8
so in this case i don't want to enter in 3rd row of 24th day for inserting or updating the data.
i am trying it using triggers but i am fail please tell me how to solve this problem
Thanks & Regards
-Chandu
[email protected]

You could use:
WHEN-VALIDATE-ITEM trigger to reject changes made
PRE-TEXT-ITEM trigger to hinder the user to enter the field if date isn't in range
Regards,
Martin MalmstrÃ¶m

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