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Mathematical Thought From Ancient To Modern Times 阅读全文
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总结： 1、 一个算法由控制结构（顺序、分支和循环3种）和原操作（指固有数据类型的操作）构成的，则算法时间取决于两者的综合效果。 2、 N*N矩阵乘法算法 时间复杂度T(n)=O(n^3) for(i=1;i<=n;i++) for(j=1;j<=n;j++) c[i][j]=0 for(k=1;k 阅读全文
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http://dev.mysql.com/doc/refman/5.7/en/index-btree-hash.html Hash Index Characteristics Hash indexes have somewhat different characteristics from thos 阅读全文
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小结 1、 mysql> INSERT INTO my_table (phone) VALUES (NULL); 有手机号但是不知道 mysql> INSERT INTO my_table (phone) VALUES ('');没有手机号 http://dev.mysql.com/doc/refm 阅读全文
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https://www.percona.com/blog/2006/06/09/why-mysql-could-be-slow-with-large-tables/ 阅读全文
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http://www-igm.univ-mlv.fr/~lecroq/string/node14.html Main features performs the comparisons from right to left; preprocessing phase in O(m+) time and 阅读全文
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http://dev.mysql.com/doc/refman/5.7/en/index-btree-hash.html MySQL 5.7 Reference Manual / ... / Comparison of B-Tree and Hash Indexes 9.3.8 Comparison 阅读全文
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w-BIG TABLE USING BTREE >BETTER >USING HASH 阅读全文
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http://dev.mysql.com/doc/refman/5.7/en/prepare.html Statement names are not case sensitive. preparable_stmt is either a string literal or a user varia 阅读全文
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https://googleblog.blogspot.com/2015/10/introducing-accelerated-mobile-pages.html October 7, 2015 October 7, 2015 Smartphones and tablets have revolut 阅读全文
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https://developers.google.com/search/docs/guides/intro-structured-data Structured data refers to kinds of data with a high level of organization, such 阅读全文
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https://static.googleusercontent.com/media/research.google.com/en//archive/bigtable-osdi06.pdf Abstract Bigtable is a distributed storage system for m 阅读全文
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COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 阅读全文
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COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 阅读全文