摘要：
Navicat 'ww' root账户 用php、Navicat、\MySQL\bin\mysql.exe 执行
阅读全文
posted @ 2016-12-23 15:41
papering
阅读(401)
推荐(0)
摘要：
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 51 bytes) Fatal error: Out of memory (allocated 1013186560) (tried to
阅读全文
posted @ 2016-12-23 14:45
papering
阅读(235)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION To understand the operation of the short-term scheduler, we need to con
阅读全文
posted @ 2016-12-23 13:07
papering
阅读(264)
推荐(0)
posted @ 2016-12-23 12:16
papering
阅读(123)
推荐(0)
摘要：
High Performance My SQL, Third Edition Consider the followingWHERE clause: WHERE eye_color IN('brown','blue','hazel') AND hair_color IN('black','red',
阅读全文
posted @ 2016-12-23 12:14
papering
阅读(249)
推荐(0)
摘要：
http://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html#function_in The number of values in the IN list is only limited by the max_allowed_pa
阅读全文
posted @ 2016-12-23 12:10
papering
阅读(160)
推荐(0)
摘要：
http://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_length LENGTH(str) Returns the length of the string str, measured in bytes. A mu
阅读全文
posted @ 2016-12-23 12:06
papering
阅读(176)
推荐(0)
摘要：
http://www.cs.rochester.edu/research/os/memerror/
阅读全文
posted @ 2016-12-23 11:18
papering
阅读(162)
推荐(0)
摘要：
http://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf Abstract Memory hardware reliability is an indispensable part of whole-system dependabilit
阅读全文
posted @ 2016-12-23 11:16
papering
阅读(263)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION A common unit of measure for failure rates of electronic components is
阅读全文
posted @ 2016-12-23 10:06
papering
阅读(953)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION
阅读全文
posted @ 2016-12-23 09:01
papering
阅读(139)
推荐(0)
摘要：
实践： 1、将 xcopy /y /d "..\bizDdl\*dll" . 当前目前的父目录下的bizDdl目录中的全部dll后缀文件复制到当前目录 注释： :: rmdir /s/q website 重命名 ren 旧名称 新名称 xcopy /y /d configGITignore.ini
阅读全文
posted @ 2016-12-22 19:24
papering
阅读(300)
推荐(0)
摘要：
Diode https://zh.wikipedia.org/wiki/真空管 抽真空 电子在于其放射过程中，因会与空气中之组成分子相撞而产生阻力，因此电子经由如空气之类的介质来移动的话，将会比在真空状态来的困难，所以若想轻松的达成电子放射之移动过程，需将产生电子放射及电子收集之各项元件，也就是灯丝
阅读全文
posted @ 2016-12-22 14:13
papering
阅读(339)
推荐(0)
摘要：
http://www.nobelprize.org/nobel_prizes/physics/laureates/1928/richardson-lecture.pdf OWEN W. RICHARDSON Thermionic phenomena and the laws which govern
阅读全文
posted @ 2016-12-22 14:01
papering
阅读(238)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION
阅读全文
posted @ 2016-12-22 12:24
papering
阅读(153)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 3.1 COMPUTER COMPONENTS As discussed in Chapter 2, virtually all contem
阅读全文
posted @ 2016-12-22 12:19
papering
阅读(281)
推荐(0)
摘要：
https://en.wikipedia.org/wiki/Syntactic_sugar http://stackoverflow.com/questions/11366006/mysql-on-vs-using http://dev.mysql.com/doc/refman/5.7/en/joi
阅读全文
posted @ 2016-12-22 11:23
papering
阅读(212)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION 3.3 INTERCONNECTION STRUCTURES A computer consists of a set of componen
阅读全文
posted @ 2016-12-22 09:09
papering
阅读(207)
推荐(0)
摘要：
DATABASE SYSTEM CONCEPTS, SIXTH EDITION There is a trade-off that the system designer must make between access timeand space overhead. Although the de
阅读全文
posted @ 2016-12-20 19:35
papering
阅读(191)
推荐(0)
摘要：
MySQL :: MySQL 5.7 Reference Manual :: 9.3.1 How MySQL Uses Indexeshttps://dev.mysql.com/doc/refman/5.7/en/mysql-indexes.html CREATE INDEX SELECT COUN
阅读全文
posted @ 2016-12-20 17:14
papering
阅读(235)
推荐(0)
摘要：
科来网络通讯协议图免费下载 - 科来 https://www.colasoft.com.cn/download/protocols_map.php 科来《网络通讯协议图2023版》.pdf https://www.colasoft.com.cn/wp-content/uploads/2023/07/
阅读全文
posted @ 2016-12-20 15:51
papering
阅读(397)
推荐(0)
摘要：
如果时间在零时区，并恰好与协调世界时相同，那么（不加空格地）在时间最后加一个大写字母Z。Z是相对协调世界时时间0偏移的代号。如下午2点30分5秒表示为14:30:05Z或143005Z；只表示小时和分，为1430Z或14:30Z；只表示小时，则为14Z或14Z。 def ts_to_format_s
阅读全文
posted @ 2016-12-20 13:32
papering
阅读(545)
推荐(0)
摘要：
The following rules describe the possibilities for defining the first TIMESTAMP column in a table with the current timestamp for both the default and
阅读全文
posted @ 2016-12-20 11:21
papering
阅读(249)
推荐(0)
摘要：
[SQL]SET slow_query_log=1 [Err] 1229 - Variable 'slow_query_log' is a GLOBAL variable and should be set with SET GLOBAL SHOW VARIABLES LIKE '%slow%' SET GLOBAL slow_query_log=1 SHOW VARIABLES ...
阅读全文
posted @ 2016-12-20 10:54
papering
阅读(336)
推荐(0)
摘要：
1 SHOW VARIABLES LIKE '%long%' 2 SET GLOBAL long_query_time=0
阅读全文
posted @ 2016-12-20 10:44
papering
阅读(269)
推荐(0)
摘要：
聚集索引和非聚集索引在索引结构中都只包含键和记录标识符。记录标识符总是指向数据页中的行。 使用聚集索引，数据库管理器将尝试以与索引页中相应键相同的顺序保持数据页中的数据。 因此，数据库管理器尝试将具有相似键的行插入到相同的页面上。如果对表进行了重组，则按照索引键的顺序将数据插入数据页。与非聚集索引的
阅读全文
posted @ 2016-12-20 10:30
papering
阅读(280)
推荐(0)
摘要：
https://dev.mysql.com/doc/refman/5.7/en/glossary.html#glos_ddl SQL The Structured Query Language that is standard for performing database operations.
阅读全文
posted @ 2016-12-20 10:26
papering
阅读(282)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Vacuum Tubes Transistors Integrated Circuits真空管 晶体管 集成电路 Electronic Num
阅读全文
posted @ 2016-12-20 09:30
papering
阅读(168)
推荐(0)
摘要：
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCEComputer architectureNINTH EDITION Computer architecture refers to those attributes of
阅读全文
posted @ 2016-12-19 13:14
papering
阅读(445)
推荐(0)
摘要：
https://zh.wikipedia.org/wiki/单片机 单片机，全称单片微型计算机（英语：single-chip microcomputer），又称微控制器（microcontroller），是把中央处理器、存储器、定时/计数器（timer/counter）、各种输入输出接口等都集成在一
阅读全文
posted @ 2016-12-19 13:02
papering
阅读(1304)
推荐(0)
摘要：
3D 生物打印血管成功植入恒河猴体内
阅读全文
posted @ 2016-12-17 20:08
papering
阅读(183)
推荐(0)
摘要：
https://en.wikipedia.org/wiki/Object-relational_mapping Object-relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programmi
阅读全文
posted @ 2016-12-17 20:01
papering
阅读(221)
推荐(0)
摘要：
1 mysqli_query($link,'SET group_concat_max_len=8192'); 2 $sql = 'SELECT GROUP_CONCAT(w) FROM ---'; 3 mysqli_query($link,$sql);
阅读全文
posted @ 2016-12-17 11:14
papering
阅读(234)
推荐(0)
摘要：
Computer Systems A Programmer's Perspective Second Edition Of course, we are glossing over many difficult issues here. What if different net- works ha
阅读全文
posted @ 2016-12-16 23:27
papering
阅读(222)
推荐(0)
摘要：
http://sqlite.org/whentouse.html Appropriate Uses For SQLite SQLite is not directly comparable to client/server SQL database engines such as MySQL, Or
阅读全文
posted @ 2016-12-16 19:08
papering
阅读(238)
推荐(0)
摘要：
http://ltp.ai/demo.html
阅读全文
posted @ 2016-12-16 10:37
papering
阅读(595)
推荐(0)
摘要：
Computer Systems A Programmer's Perspective Second Edition To this point in our study of computer systems, we have assumed thatprograms run in isolati
阅读全文
posted @ 2016-12-16 09:39
papering
阅读(169)
推荐(0)
摘要：
Computer Systems A Programmer's Perspective Second Edition The main memory of a computer system is organized as an array of M contiguousbyte-sized cel
阅读全文
posted @ 2016-12-15 20:00
papering
阅读(454)
推荐(0)
摘要：
Computer Systems A Programmer's Perspective Second Edition Exception number Description Exception class0 Divide error Fault13 General protection fault
阅读全文
posted @ 2016-12-15 19:50
papering
阅读(455)
推荐(0)
摘要：
https://en.wikipedia.org/wiki/General_protection_fault In memory errors, the faulting program accesses memory that it should not access. Examples incl
阅读全文
posted @ 2016-12-15 19:38
papering
阅读(336)
推荐(0)
浙公网安备 33010602011771号