what function to use to see if cell value exists

Hi,
I am unable to find the proper function to get the following.
I have 2 cells with date and time in a table. I have to check if the
combination of given date & time exists in the table before a new record is
inserted.
Any idea what function will do this?

Ashok.

"Ashok" <non2@mail.ru> wrote in message news:d7ijun$qps$1@gavrilo.mtu.ru...
> Hi,
> I am unable to find the proper function to get the following.
> I have 2 cells with date and time in a table. I have to check if the
> combination of given date & time exists in the table before a new record
> is
> inserted.
> Any idea what function will do this?

Would this help?
in_array() -- Checks if a value exists in an array

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