MySQL提供标准的SQL模式匹配,以及一种基于象Unix实用程序如vi、grep和sed的扩展正则表达式模式匹配的格式。一、SQL模式SQL的模式匹配允许你使用“_”匹配任何单个字符,而“%”匹配任意数目字符(包括零个字符)。在
MySQL中,SQL的模式缺省是忽略大小写的。下面显示一些例子。注意...
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数据库 时间:
2014-04-30 19:49:42
阅读次数:
494
Given a digit string, return all possible
letter combinations that the number could represent.A mapping of digit to
letters (just like on the telephon...
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其他好文 时间:
2014-04-30 03:52:56
阅读次数:
411
DescriptionLetxandybe two strings over some finite
alphabetA. We would like to transformxintoyallowing only operations given
below:Deletion:a letter i...
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其他好文 时间:
2014-04-29 16:22:00
阅读次数:
450
Alice and BobDescriptionAlice and Bob like
playing games very much.Today, they introduce a new game.There is a polynomial
like this: (a0*x^(2^0)+1) * ...
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其他好文 时间:
2014-04-28 02:50:32
阅读次数:
357
The string"PAYPALISHIRING"is written in a
zigzag pattern on a given number of rows like this: (you may want to display
this pattern in a fixed font fo...
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其他好文 时间:
2014-04-27 21:36:45
阅读次数:
515