大约有 40,000 项符合查询结果（耗时：0.0375秒） [XML]
How to count occurrences of a column value efficiently in SQL?
...Microsoft SQL (i.e 2000)
SELECT age, count(*)
FROM Students
GROUP by age
ORDER BY age
share
|
improve this answer
|
follow
|
...
How to frame two for loops in list comprehension python
...
The best way to remember this is that the order of for loop inside the list comprehension is based on the order in which they appear in traditional loop approach. Outer most loop comes first, and then the inner loops subsequently.
So, the equivalent list comprehensi...
Trying to fire the onload event on script tag
I'm trying to load a set of scripts in order, but the onload event isn't firing for me.
1 Answer
...
Reordering of commits
...the base. Git will present you with a list of the commits in this range. Reorder them and tell git to squash the appropriate ones:
pick c ...
pick a ...
squash d ...
squash e ...
squash g ...
pick b
squash f
Now the history should look like this:
c - [a+d+e+g] - [b+f] (branchA)
/
--o-x-x-...
Index on multiple columns in Ruby on Rails
...
The order does matter in indexing.
Put the most selective field first, i.e. the field that narrows down the number of rows fastest.
The index will only be used insofar as you use its columns in sequence starting at the beginnin...
WebRTC vs Websockets: If WebRTC can do Video, Audio, and Data, why do I need Websockets? [closed]
...t that (I believe) WebRTC can be configured to be less strict about packet order and stuff, so it can be much faster is you don't mind some packet loss etc (i.e. having the latest data is more important than having all the data): stackoverflow.com/a/13051771/993683
– user993683...
MySQL offset infinite rows
...ch I agree with, but only to a point. Let's say you're returning a list of orders to a customer. It's perfectly reasonable to never return more than, say, a million at a time, but limiting to 100 might cause confusion.
– Autumn Leonard
Aug 3 '18 at 20:15
...
C++ Erase vector element by value rather than by position? [duplicate]
and lets say the values in the vector are this (in this order):
4 Answers
4
...
Nginx location priority
What order do location directives fire in?
3 Answers
3
...
PHP: Convert any string to UTF-8 without knowing the original character set, or at least try
...ever, you could try doing this:
iconv(mb_detect_encoding($text, mb_detect_order(), true), "UTF-8", $text);
Setting it to strict might help you get a better result.
share
|
improve this answer
...