we are working in some customization and a question had been raised to me that , is the validstate fields (ValidFrom-ValidTo ) allow date overlapping
Ex:- suppose that i have a shift table and i wanna the worker to have valid from to valid shift
like
worker shiftcode ValidFrom ValidTo
0001 sh0001 1/4/2013 1/5/2013
what will happen if some assign another shift in different dates but in the same month
like
worker shiftcode ValidFrom ValidTo
0001 sh0002 15/4/2013 15/5/2013
how to prevent date overlapping like the above example ?????
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