Are those 2 fields Dates or DateTime? They are Datetime fields.
Are new records created on re-admittance? Yes, they each have a new {Patient.CSN} for each admit.
Neither of those fields seems to have a readmit date or time.
There is no readmit field in our tables.
BTW, what have you tried and what do you mean by 'same dates multiple times'?
I've tried putting the {Discharge.Effective Time} and {Admit.Effective Time} on the same detail line and suppress any duplicates. We have a ADT table that holds all the admit, discharge, and transfer data. I link a copy of the ADT(ADT_ADMIT) table with ADT.ADM_EVENT_ID to ADT_ADMIT.EVENT_ID and then the ADT table to another copy of the ADT(ADT_DISCHARGE) table with ADT.DISCHARGE_EVENT_ID to the ADT_DISCHARGE.EVENT_ID.
MRN #
1111111 Discharge Time Discharge CSN Admit Time Admit CSN DateDiff
1111111 1/16/09 15:19 66666666 1/13/09 21:46 66666666 2.75
1111111 2/28/09 13:55 77777777 2/24/09 15:25 77777777 3.92
1111111 4/30/09 11:44 88888888 4/28/09 14:35 88888888 1.88
1111111 5/29/09 10:30 99999999 5/26/09 15:20 33333333 2.79
1111111 6/18/09 18:29 44444444 6/16/09 17:51 55555555 2.04
1111111 6/25/09 11:00 22222222 6/19/09 15:29 22222222 5.83