TSQL - Conversion of Epcoh to Datetime

Convert Current UTC date to Epoch


SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
SELECT DATEDIFF(s, '19700101', GETUTCDATE())


Convert Epoch to dateTime

select dateadd(ss, epoch, '19700101')

SELECT DATEADD(s, epoch, '1970-01-01 00:00:00')


Example
select dateadd(ss, 1394796484, '19700101')

SELECT DATEADD(s, 1393345800, '1970-01-01 00:00:00')

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