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Linq 多字段排序，二次排序 - .NET(C#) - 清泛IT论坛，有思想、有深度
Linq：ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );
类似SQL：select * from t1 order by f1 desc ,f2 asc
这种写法里 OrderBy、ThenBy 是升序的，OrderByDescending、ThenByDescending 是降序的。
Get the first element of each tuple in a list in Python [duplicate]
An SQL query gives me a list of tuples, like this:
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How to highlight text using javascript
...t-search or Lucene], then you can escape every character with \ and add an SQL-escape-statement, that way you'll find special characters that are LIKE-expressions.
e.g.
WHERE textField LIKE CONCAT('%', @query, '%') ESCAPE '\'
and the value of @query is not '%completed%' but '%\c\o\m\p\l\e\t\e\d%'
(...
Convert String[] to comma separated string in java
...in(names,"','") + "'"; this would give you the Single quotes needed by the SQL request.
– haysclark
Feb 26 '16 at 4:22
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Best Practices: Salting & peppering passwords?
...o control over the server/code. This situation is not uncommon: aside from SQL-injection, also thrown away backups, discarded servers… can lead to this situation. A lot of PHP users work on hosted servers.
– martinstoeckli
Jun 4 '13 at 20:14
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SQLAlchemy: What's the difference between flush() and commit()?
What the difference is between flush() and commit() in SQLAlchemy?
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How do I show the schema of a table in a MySQL database?
From the MySQL console, what command displays the schema of any given table?
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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...；石油管道会穿越很多无人区，附近没有网络设施，因此使用卫星通讯最为经济；高轨道的GEO卫星站得高看得远，覆盖范围广，但轨道高延迟就大了。中低轨道的LEO/MEO卫星延迟小，但是覆盖区域有限，每天都会出现卫星切换时...
One DbContext per web request… why?
...s applicable to any sort of Unit of Work implementation, such as
LINQ to SQL's DataContext, and NHibernate's ISession.
Let start by echoing Ian: Having a single DbContext for the whole application is a Bad Idea. The only situation where this makes sense is when you have a single-threaded applica...
Difference between BYTE and CHAR in column datatypes
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