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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....
How to perform .Max() on a property of all objects in a collection and return the object with maximu
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edited May 23 '17 at 11:47
Community♦
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answered Jul 9 '09 at 5:32
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How can I convert the “arguments” object to an array in JavaScript?
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730
+100
ES6 usi...
Importing a CSV file into a sqlite3 database table using Python
I have a CSV file and I want to bulk-import this file into my sqlite3 database using Python. the command is ".import .....". but it seems that it cannot work like this. Can anyone give me an example of how to do it in sqlite3? I am using windows just in case.
Thanks
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Limit labels number on Chart.js line chart
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edited Jan 30 '17 at 16:27
reformed
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How to check if a string is a valid date
I have a string: "31-02-2010" and want to check whether or not it is a valid date.
What is the best way to do it?
14 Answ...
Should Gemfile.lock be included in .gitignore?
... User that is not a user
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answered Nov 11 '10 at 5:13
rwilliamsrwilliams
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Unresolved specs during Gem::Specification.reset:
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edited Oct 17 '17 at 3:58
EricC
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answered Aug 8...
What is the purpose of flush() in Java streams?
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Sergey Brunov
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answered Feb 26 '10 at 7:40
codaddictcodaddict
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MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...符号的，而如果它对应的值是负的，则返回时是一个2的32次方减去这个绝对值的数
Format("this is %u",-2);
返回的是：this is 4294967294
f 对应浮点数
e 科学表示法，对应整型数和浮点数，
Format("this is %e",-2.22);
返回的是：t...