September 3, 2009 at 1:23 pm
I have an interesting conversion issue...
Run these statements (SQL server 2005):
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.100')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.101')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.102')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.103')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.104')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.105')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.106')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.107')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.108')
SELECT CONVERT(DATETIME, '2009-08-20 12:00:00.109')
Notice how the last number in the ms doesn't always match - why is that? You can use any time you want - the only thing that matters is the last digit.
September 3, 2009 at 1:39 pm
Because DateTime data type is accurate to 1/300th of a second, not 1/1000th of a second. The definition of the data type in Books Online (or MSDN) explains this and has samples.
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