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ROW_NUMBER() in MySQL
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I want the row with the single highest col3 for each (col1, col2) pair.
That's a groupwise maximum, one of the most commonly-asked SQL questions (since it seems like it should be easy, but actually it kind of isn't).
I often plump for a null-self-join:
SELECT t0....
urllib2.HTTPError: HTTP Error 403: Forbidden
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3 Answers
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What is more efficient? Using pow to square or just multiply it with itself?
... elapsed << " "; \
\
return x; \
}
TEST(1, b)
TEST(2, b*b)
TEST(3, b*b*b)
TEST(4, b*b*b*b)
TEST(5, b*b*b*b*b)
template <int exponent>
double testpow(double base, long loops)
{
double x = 0.0;
boost::posix_time::ptime startTime = now();
for (long i=0; i<loops; ++i)
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What is the purpose of the EBP frame pointer register?
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edited Sep 13 '17 at 18:21
answered Feb 23 '09 at 20:55
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Is MATLAB OOP slow or am I doing something wrong?
...ction/method 100000 times
nop() function: 0.02261 sec 0.23 usec per call
nop1-5() functions: 0.02182 sec 0.22 usec per call
nop() subfunction: 0.02244 sec 0.22 usec per call
@()[] anonymous function: 0.08461 sec 0.85 usec per call
nop(obj) metho...
How to make an immutable object in Python?
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edited May 23 '17 at 12:34
Community♦
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answered Jan 28 '11 at 13:39
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Formatting numbers (decimal places, thousands separators, etc) with CSS
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answered Oct 9 '18 at 21:32
CascadiaJSCascadiaJS
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Why do Java webapps use .do extension? Where did it come from?
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