2016年12月27日
Twos Complement Representation
摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Like sign magnitude, twos complement representation uses the most signi 阅读全文
posted @ 2016-12-27 23:24 papering 阅读(273) 评论(0) 推荐(0)
SELECT 'www' = 0; 1
摘要： http://dev.mysql.com/doc/refman/5.7/en/type-conversion.html MySQL 5.7 Reference Manual / Functions and Operators / Type Conversion in Expression Evalu 阅读全文
posted @ 2016-12-27 19:09 papering 阅读(226) 评论(0) 推荐(0)
SET ? DECLARE
摘要： http://dev.mysql.com/doc/refman/5.7/en/declare-local-variable.html http://dev.mysql.com/doc/refman/5.7/en/set-variable.html SET Syntax for Variable As 阅读全文
posted @ 2016-12-27 18:40 papering 阅读(183) 评论(0) 推荐(0)
Defining Stored Programs
摘要： ok ok http://dev.mysql.com/doc/refman/5.7/en/stored-programs-defining.html 阅读全文
posted @ 2016-12-27 18:11 papering 阅读(196) 评论(0) 推荐(0)
Sign-Magnitude Representation
摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION There are several alternative conventions used to represent negative as 阅读全文
posted @ 2016-12-27 14:08 papering 阅读(418) 评论(0) 推荐(0)
the core or essence of a computer
摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The ALU is that part of the computer that actually performs arithmetic 阅读全文
posted @ 2016-12-27 13:23 papering 阅读(188) 评论(0) 推荐(0)
HEXADECIMAL NOTATION is Syntactic_sugar.
摘要： Syntactic_sugar. 阅读全文
posted @ 2016-12-27 13:20 papering 阅读(129) 评论(0) 推荐(0)
Converting from Decimal Notation to Binary Notation for Fractions
摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Therefore, the conversion algorithm involves repeated multiplication by 阅读全文
posted @ 2016-12-27 13:17 papering 阅读(185) 评论(0) 推荐(0)
convert from base 10 to base 2
摘要： COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Hence, we convert from base 10 to base 2 by repeated divisions by 2. Th 阅读全文
posted @ 2016-12-27 13:14 papering 阅读(238) 评论(0) 推荐(0)
MYSQL PASSWORD()
摘要： https://www.pythian.com/blog/hashing-algorithm-in-mysql-password-2/ 阅读全文
posted @ 2016-12-27 12:04 papering 阅读(166) 评论(0) 推荐(0)
Environment Variables
摘要： https://msdn.microsoft.com/en-us/library/windows/desktop/ms682653(v=vs.85).aspx Every process has an environment block that contains a set of environm 阅读全文
posted @ 2016-12-27 11:59 papering 阅读(242) 评论(0) 推荐(0)
Why Stored Procedures?
摘要： http://www.w3resource.com/mysql/mysql-procedure.php Stored procedures are fast. MySQL server takes some advantage of caching, just as prepared stateme 阅读全文
posted @ 2016-12-27 10:19 papering 阅读(156) 评论(0) 推荐(0)
delimiter
摘要： http://www.mysqltutorial.org/getting-started-with-mysql-stored-procedures.aspx The first command is DELIMITER // , which is not related to the stored 阅读全文
posted @ 2016-12-27 09:59 papering 阅读(200) 评论(0) 推荐(0)