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; SELECT * from users;+----+----------+----------------------------------+-----+------+| ID | Username | password | Age | sex |+----+----------+----------------------------------+-----+------+| 1 | Tom | 123 | 23 | 1 || 2 | Tom | 123 | 23 | 1 || 3 | Rose | 202cb962ac59075b964b07152d234b70 | 10 | 0 |+----+----------+----------------------------------+-----+------+ ----Other ways to insert records --insert. SET Unlike insert, you can make subqueries (subquery), and you can insert only one record a
First create related database: Database name I use the books table name is the book (the following is the complete database, the img/img01.jpg is the path to display the picture)CREATE DATABASE Books DEFAULT Charset=utf8;Use books;CREATE TABLE Book (b_id INT PRIMARY KEY auto_increment,B_name VARCHAR (+) is not NULL UNIQUE,B_img VARCHAR () not NULL,B_intro VARCHAR (500),B_author VARCHAR (500),B_house VARCHAR (500),B_number VARCHAR (500),B_time VARCHAR (500),B_price VARCHAR (500),B_stock VARCHAR (
Document directory Why vector clocks are easy Why vector clocks are hard Why vector clocks are easy Http://basho.com/blog/technical/2010/01/29/why-vector-clocks-are-easy/Vector clocks by example Through the following routine examples to help you understand vector clock, you will find that this algorithm is not complex.You want to plan the day of dinner next week? How can we achieve eventual consistency?Of course, this problem can also be solved using paxos.Another idea is to use the vector c
We know that in the Ubuntu 9.10 operating system, you can use the following command to install monodevelop 2.0: $ Sudo apt-Get install monodevelop However, to install the latest monodevelop 2.2, follow these steps:Source codeCompile: Ben @ Ben-vbox :~ $ CD SRC Ben @ Ben-vbox :~ /Src $ SVN Co
A few days ago, Lao Zhao published two articlesArticle: Use Scala language (I) on the. NET platform: first taste and use Scala language (I) on the. NET platform: analysis. After reading this article, I am also interested in Scala. So I started to try. Installing Scala SDK on Ubuntu 9.10 is very simple: Ben@ben-m4000t :~ $Sudo apt-Get installScalaBen@ben
mess. How to solve? How many days are there this month? Last year's Day? At this time of yesterday? 2 hours later? ... In these scenarios, the Python built-in function basically checks the official documents, or Google or StackOverflow. The conversion between datetime, date, timestamp, and time string can be a headache, and the '%y-%m-%d%h:%m:%s ' is full of screens.In this case, the Sandglass library was born. Freed, the main function is 2.
MYSQL: SQL _CALC_FOUND_ROWS and count (*) performance comparison bitsCN.com 1. create a table: // Overwrite the index create table if not exists 'Ben' ('A' int (10) unsigned not null AUTO_INCREMENT, 'BB' int (10) unsigned not null, 'CC' varchar (100) not null, primary key ('A'), KEY 'bar' ('BB ', 'A') ENGINE = MyISAM; // no overwriting index drop table if exists 'Ben'; create table if not exists '
| password | Age | sex |+----+----------+----------------------------------+-----+------+| 1 | Tom | 123 | 23 | 1 || 2 | Tom | 123 | 23 | 1 || 3 | Rose | 202cb962ac59075b964b07152d234b70 | 10 | 0 |+----+----------+----------------------------------+-----+------+ ----Other ways to insert records --insert. SET Unlike insert, you can make subqueries (subquery), and you can insert only one record at a time INSERT Tbl_name mysql> INSERT users SET username= ' Ben
. writeline ("CLR version: {0} ({1})", environment. version, skyiv. runtimeframework. currentframework); console. writeline ("default encoding:" + system. text. encoding. default); console. writeline (skyiv. DOTNET. urlencode ("Welcome to Scala-msil! "); Console. writeline (skyiv. DOTNET. todecimal (system. math. pi); console. writeline ("{0: N0}", skyiv. DOTNET. todecimal (system. double. maxvalue); console. writeline (skyiv. DOTNET. getfilemodes (); // console. writeline (skyiv. thexmltree. ge
China's first webmaster network novel "Network Life" "Chinese Webmaster Station chinaz.com and webmaster China original starting" Chinese Webmaster station column Author: Make Fox lone webmaster China Forum ( http://bbs.zzchn.com July 22, 2007, qq:58893388, this article updated every day, have comments or views please contact the author. Thanks for your cooperation. The copyright belongs to the Fox Lone (FOX) and stationmaster China all. Reprint please be careful 3 Out of the school gate, Yang h
yourself, your calling circle consists of all people whom-you-call and who-call-you, either directly or IND irectly. For example, if Ben calls Alexander, Alexander calls Dolly, and Dolly calls Ben, they is all within the same circle. If Dolly also calls Benedict and Benedict calls Dolly, then Benedict are in the same calling circle as Dolly, Ben, and Alex Ander.
Title Requirements:A bookstore for the "Harry Potter" series of books for promotional activities, a total of 5 volumes, with numbers 0, 1, 2, 3, 4, a single volume of 8 yuan, the specific discount is as follows:Discount on this number2 5%3 10%4 20%5 25%Depending on the number of volumes purchased and this number, different discount rules will be applicable. The singular book only corresponds to one discount rule, for example, two volume 1, one volume 2, you can enjoy 5% discount, another volume
Dictionaries are also one of the most commonly used data types in the development process. If you need to store information about a class student, each student has a name, gender, age, address, and so on, and if you store it in a list, you need a lot of lists. In this time, we need to use a dictionary to define. Dictionary, Dict,dictionary.names = [' Amy ', ' Lily ', ' Ben ']infos = [[], ' female ', ' Beijing '],[17, ' female ', ' Tianjin '],[21, ' Ma
of this is seen on the Oschina: Copy Code code as follows: $a = Array (' Abe ', ' Ben ', ' cam '); foreach ($a as $k => $n) $n = Strtoupper ($n); foreach ($a as $k => $n)//Notice NO reference here! echo "$nn"; Print_r ($a); ?> would result in: ABE Ben Ben Array ( [0] => ABE [1] => BEN
Preface After the opensuse 12.1 operating system is installed in virtualbox 4.1.10, it comes with vboxguestadditions 4.1.4, as shown below: Ben @ vbox: ~> Zypper search virtualbox-guest Loading repository data... reading installed packages... S | Name | summary | type -- + ---------------------------- + bytes + -------- | virtualbox-guest-KMP-default | guest kernel modules for virtualbox | packagei | Virtualbox-guest-KMP-Desktop | Guest kernel modul
I wrote a winform in C #.ProgramThe error "sqldbtype enumeration value 31 is invalid" appears on the machine of the business department, as shown in: This program runs normally on my own machine: Then I open the debug mode of the Program on the machine of the business department (the program command line is followed by the/debug parameter, and the screen below is captured on my own machine ): Run this program again to get more detailed error information: It can be
Description of the Msyql Field function [reprint], msyqlfield This function is relatively simple. Let's take a look at it: MySQL can use the field () function to customize sorting. The format is field (value, str1, str2, str3, str4). The value is compared with str1, str2, str3, and str4, 1, 2, 3, and 4 are returned. If null is returned or data is not in the list, 0 is returned. this function seems to be not provided in Oracle (or I may not use it), but it is relatively simple to implement such
Small Q Series Story--Big BenTime limit:600/200 MS (java/others) Memory limit:65535/32768 K (java/others)Total submission (s): 1458 Accepted Submission (s): 734Problem Description suffered emotional distress of small Q this plan to seclusion for some time, but only on March 25 day did not appear, there are many friends miss him, so, he decided to come out again today, formally and everyone to do a farewell. Small Q recently sleep condition is very poor--night can't sleep, in the morning again
In the first two articles, to run the scala. Net program, we need to copy predef. DLL to the current directory. This is unpleasant. First, I thought of adding predef. DLL to the Global Assembly Cache (GAC, Global Assembly Cache), as shown below: ben@ben-m4000t:~$ sudo gacutil -i /opt/scala-2.7.7.final/lib/predef.dllFailure adding assembly /opt/scala-2.7.7.final/lib/predef.dll to the cache: Attempt to inst
Preface Ubuntu10.10 comes with Mono2.6.7. The latest version is Mono2.8.2. Because software such as "a note" in the Ubuntu operating system is developed in C #, they depend on Mono. To avoid damaging such software in the Ubuntu operating system, we need to install Mono2.8.2 in parallel. The specific method is to install it in the/opt/mono-2.8.2 directory. In this way, the two versions of Mono can coexist. Prerequisites Ubuntu 10.10 comes with Mono 2.6.7. The latest version is Mono 2.8.2. Because
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