11-21-2014
Even if you know the granularity of the local datetime, in an optimistic world you would love it to be portable. In place of worrying about the precision, which might be a very odd fraction not easily accessible by string number conversions, kiss "BETWEEN" goodbye and use "ColDate >= Date and ColDate < (Date+1day)". It has no hole. The SQL compile will just take your BETWEEN and turn it into a similar pair of predicates. There is no run time advantage. If indexed, it will search for the low value and read to the high value in the index, a range scan.
The SQL gods should have made a way to say if BETWEEN end points were included or not, like those open/dark end line point dots in math class. Many languages have these misconceived pitfalls to avoid, except when taking mindless proficiency tests to get hired.
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