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MySQL Base exerciseI. Self-replenishmentDesc (table name) T1; View table Information content table information Show create TABLE T1 (table name): Also view information, not much is landscape view show create table T1 \g; vertical view

\ \ Customer AttributesCREATE TABLE ' users ' (' id ' int (one) not NULL auto_increment COMMENT ' number ',' Name ' varchar (255) Default NULL COMMENT ' Customer name ',' Age ' int (3) COMMENT default NULL ' ages ',' Gender ' int (2) Default ' 0 '

The CREATE TABLE account (accid INT DEFAULT ' 0 ' is not NULL, Acccode CHAR, Accname VARCHAR (30), PRIMARY KEY (accid)) Engine=innodb DEFAULT Charset=utf8; CREATE TABLE Role (Roleid INT DEFAULT ' 0 ' not NULL, Rolecode CHAR, RoleName VARCHAR (

Database foreign key 01.mysql> Show CREATE TABLE Country\g02.*************************** 1. Row ***************************Table:country.04.Create table:create Table ' Country ' (The ' country_id ' smallint (5) unsigned not NULL

(1) using the database MySQL, the scripting language is as follows:/* User table */create table ' usertbl ' (' id ' int (one) not NULL auto_increment, ' username ' varchar () DEFAULT NULL, ' password ') varchar () default NULL, ' permission ' int

Design and implementation of a typical PHP payment systemReference: blog.sina.com.cn/s/blog_81f6205801017ec8.htmlPayment development:Http://www.cnblogs.com/txw1958/p/wxpayv3-bill.htmlDrew 2 weeks to write, small perfectly formed, a variety of

This article mainly explains the mysql commands in centoslinux (redhatlinux). If your mysql is installed in source code, I add the "mysql installation directory bin" to the path environment variable, mysql startup script has been copied to etcinit.

MySQL foreign key constraint cascading deletion when updating a database, the first table is used to store some simple blog data, and the second table is used to store comments related to these blogs. This example cleverly defines a foreign key

Analysis of MySQL replace into statements (2) This article mainly introduces the MySQL replace into Statement Analysis (2). This article focuses on several special case studies. For more information, see 1. Introduction The previous article

SQL templates created for Mysql databases, tables, character sets, and primary and Foreign keys # If a database with the same name exists, delete the database with the same name.Drop database if exists cfms;# If the cfms database whose

Due to the company's business needs, spend two weeks to achieve a small payment system, perfectly formed, a variety of necessary modules such as account lock, transactional assurance, water reconciliation, etc. are fully realized, the whole

This article mainly introduces the PHP payment system design and typical cases, which can be used as a small payment system or a payment flow system when third-party applications access the open platform, it has some reference value. if you are

  Use mysqldump to export databases. First, I met a database named mydb, There are two tables, mytable and mytabletwo. Both tables have data.   C: \ Program Files \ mysql \ MySQL Server 5.1 \ bin> mysqldump-uroot-proot-D mydb> C:/KUjiegou. SQL//

I. Basic1.serialize: Serialize a class, just save the properties of the class, so you also need to deserialize the unserialize when the class is included.2. For converting an array to object, this conversion is called an orphan class because there

We've introduced the knowledge points of spring cloud and oauth2 in the previous few, and today we're going to use spring cloud and oauth2 to build Commonservice-sso services, In this section we are just building Commonservice-sso foundation

An introduction The basic principle of replace into is introduced in the previous article. This chapter provides an example of the potential data quality risk associated with the replace into, and when a table involving a replace into operation

first about the relationship between tables and tables 1. A One-to-many2. A One-to-many3. Multiple to One4. Multi-pair multi- parent table and child table 1. "One" is the parent table2. One side of "many" is how a child table handles a one-to-many

MySQL partition table: Logically a table, physically a collection of tables composed of multiple child tables, each of which is relatively independent,Each store their own data and index. This partition table is also called the Local partition table.

Btcpool-slparser (share log parser) module analysis core mechanism Summary Three functions are supported:??Specify the date and UID to print the share information of the user specified by the specified date to stdout.????When uid = 0, the share

Complete e-commerce project source code Http: // 58.16.209.155: 9080/htmis/public/bookstoressh.rar SSH electronic Mall (Electric Appliance sales project) Http: // 58.16.209.155: 9080/htmis/public/BBS/market.rar SSH framework student management