sql - Convert the datetime value to floor -

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when go through our application's existing stored procedure, saw below code:

cast(floor(cast(@weekdate float)) datetime)

any 1 explain purpose behind code? @weekdate datetime field.

it truncates time datetime.

select dateandtime = getdate(),        dateonly = cast(floor(cast(getdate() float)) datetime)

demo

here way use on sql-server 2005:

dateadd(dd, datediff(dd,0, getdate()), 0)

sql-server 2008 introduced date type, it's easier:

cast(@weekdate date)

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