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T-SQL Cast versus Convert
...e extended features, use CAST.
EDIT:
As noted by @beruic and @C-F in the comments below, there is possible loss of precision when an implicit conversion is used (that is one where you use neither CAST nor CONVERT). For further information, see CAST and CONVERT and in particular this graphic: SQL S...
How do you sort an array on multiple columns?
... same, then it sorts by the second attribute. So in your example, A would come before J. In the case where A is the same for two elements, then it would use the second attribute. So For [A,10], [A,5], 5 comes before 10 so it would end up with [A,5],[A,10] for the ordering. The thing you may be mi...
NSIS学习笔记（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...Parent = hwndParent;
EXDLL_INIT();
//读取输入参数
WCHAR szComponent[256];
popstring(szComponent);
//打印参数
WCHAR buf[1024];
//这里能正确打印出来自NSIS的中文信息。
wsprintf(buf, L"kagula $0=[%s][中文测试]\n", szComponent);
MessageBoxW(g_hwndPar...
Should I impose a maximum length on passwords?
... edited Feb 8 '17 at 14:08
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answered Sep 19 '08 at 1:52
epochwolfepochwolf
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Sending files using POST with HttpURLConnection
Since the Android developers recommend to use the HttpURLConnection class, I was wondering if anyone can provide me with a good example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything com...
How to store date/time and timestamps in UTC time zone with JPA and Hibernate
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How to understand nil vs. empty vs. blank in Ruby
... nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come:
14 Answers
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Get elements by attribute when querySelectorAll is not available without using libraries?
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Using != null is the ideal way (better than my comment above) because in old IE it is possible for getAttribute to return a value whose typeof is 'number'
– ryanve
Nov 24 '12 at 19:51
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Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...Peter says that it depends on your indexes and other factors. Many of the comments to the post seem to say that SQL_CALC_FOUND_ROWS is almost always slower - sometimes up to 10x slower - than running two queries.
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