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jdavidb (1361)

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J. David Blackstone has a Bachelor of Science in Computer Science and Engineering and nine years of experience at a wireless telecommunications company, where he learned Perl and never looked back. J. David has an advantage in that he works really hard, he has a passion for writing good software, and he knows many of the world's best Perl programmers.

Journal of jdavidb (1361)

Thursday May 03, 2007
09:08 AM

Oracle hint for the clueless of the day: date conversions

[ #33187 ]


datevar2 := TO_DATE(TO_CHAR(datevar1, 'DD-Mon-YY HH24:MI:SS'), 'DD-Mon-YY HH24:MI:SS');

Hint: such conversions are never required. Hint 2: if you ever contemplate whether such a conversion is required, you probably don't belong in this business.

Hint 3: such conversions are not required even when date math is involved:

datevar2 := TO_DATE(TO_CHAR((datevar1 + 1/24), 'DD-Mon-YY HH24:MI:SS'), 'DD-Mon-YY HH24:MI:SS');

Taken from actual code, of course.

Oh, and hint 4: don't use such ugly date masks. Go with ISO standard or something: 'YYYY-MM-DD"T"HH24:MI:SS'. It's only internal anyway, right?

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