How can we update Seniority/Length of Service accurately on daily basis with a Schedule Process?

Summary:

How can we update Seniority/Length of Service accurately for all the employees, on daily basis with a Schedule Process?

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As per the current Oracle setup, Seniority/Length of Service of the employees not getting calculated accurately, if employees doesn't have change in their data. Do we any work around to fix this issue and get the accurate calculations on any day?

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