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1. blog.51cto.com › u_16099279 › 10999608sql条件小于号按索引 sql中的小于号 - 51CTO博客

   blog.51cto.com › u_16099279 › 10999608

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   20 hours ago · sql条件小于号按索引 sql中的小于号，SQL对大小写不敏感：SELECT与select是相同的。SELECT语句用于从数据库中选取数据。结果被存储在一个结果表中，称为结果集。cmd访问mysql的方法mysql-hlocalhost-uroot-pSQL使用单引号来环绕文本值（大部分数据库系统也接受双引号）。

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3. blog.51cto.com › u_16099326 › 10997606一条sql最多索引 sql索引最左原则 - 51CTO博客

   blog.51cto.com › u_16099326 › 10997606

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   20 hours ago · 一条sql最多索引 sql索引最左原则，索引最左匹配：所谓最左原则指的就是如果你的SQL语句中用到了联合索引中的最左边的索引，那么这条SQL语句就可以利用这个联合索引去进行匹配，值得注意的是，当遇到范围查询(>、<、between、like)就会停止匹配。

4. www.dingdanghao.com › article › 552415sql时间模糊怎么查 - 叮当号

   www.dingdanghao.com › article › 552415

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   20 hours ago · sql 中使用模糊查询查找时间是一种特殊的查找类型，它允许用户查找与给定时间段重叠或部分匹配的时间值。可使用的运算符 ...

5. en.wikipedia.org › wiki › UTF-8UTF-8 - Wikipedia

   en.wikipedia.org › wiki › UTF-8

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   20 hours ago · UTF-8. UTF-8 is a variable-length character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format – 8-bit. [1] UTF-8 is capable of encoding all 1,112,064 [a] valid Unicode code points using one to four one- byte (8-bit) code units.

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