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delete duplicate data

Last Modified: 2016-09-26
I need to delete duplicate data
i.e. if i have 2 rows exactly the same, delete one of the rows

I have a table called Tbl_Data
It has these columns

GPSDateTime (datetime)
ReportID (int)
DeviceID (int)

If all 3 columns match data (except ID) I want to delete one of the rows so i'm left with unique data rows instead duplicates

how might i Do this?
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