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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。
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【数据库】 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎
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工具
【ASCII编解码】AsciiConversion 拓展
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建表的SQL语句如下：
CREATE TABLE user(username TEXT PRIMARY KEY, password TEXT);
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最后提一下日志调试功能：
上面其实是用户密码信息，在日志控制台中能够输出便于调试查看。
count(*) vs count(column-name) - which is more correct? [duplicate]
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there is a performance difference (at least in MySQL) as well (see my answer).
– nickf
Jun 9 '10 at 7:51
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Get the first element of each tuple in a list in Python [duplicate]
An SQL query gives me a list of tuples, like this:
5 Answers
5
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Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据mysql存储在磁盘中，各种天灾人祸都会导致数据丢失。大公司的时候我们常常需要做好数据冷热备，对于小公司来说要做好所有数据备份需要支出...mysql存储在磁盘中，各种天灾人祸...
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%'
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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?
5 Answers
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