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Convert Bigint time to datetime


Convert Bigint time to datetime

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PSB
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Hi,

How to convert bigint time to datetime (CST)

Declare @MyBigIntTime BIGINT =1397750400000

Thanks,
PSB
gbritton1
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What units are your bigint in? Minutes, seconds, hours, years, microseconds, months ,picoseconds?
PSB
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Minutes
Lynn Pettis
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Also, what date and time does the value provided equate?

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What is the base date? 1900-01-01, 1970-01-01. The basic idea is:

DATEADD(Minute, Integer, BaseDate)



Jack Corbett

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Unfortunately, you get an overflow error when trying to convert the BIGINT value provided to an INT value when using DATEADD.

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Lynn Pettis

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Well, OK. Just do it in a loop, adding portions of bigint that fit into an integer to an accumulating date field.
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gbritton1 (4/17/2014)
Well, OK. Just do it in a loop, adding portions of bigint that fit into an integer to an accumulating date field.


Okay, using what for a base? The OP still hasn't told us what the value provided represents.

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Lynn Pettis

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select DATEADD(Minute, 1397750400000, '1970-00-01')
Getting an overflow error .


Arithmetic overflow error converting expression to data type int.
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PSB (4/17/2014)

select DATEADD(Minute, 1397750400000, '1970-00-01')
Getting an overflow error .


Arithmetic overflow error converting expression to data type int.


Yep, told you that would happen earlier.

Now, what date and time does 1397750400000 represent??

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Lynn Pettis

For better assistance in answering your questions, click here
For tips to get better help with Performance Problems, click here
For Running Totals and its variations, click here or when working with partitioned tables
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