table database example

The following is how to organize Discuz! X3.0 database dictionary. The table name is divided into three parts, which are separated by the following line. The following example uses pre _ as the prefix. In the middle, such as common, forum, connect,

database table Basic Operations After thinking, finally the name of the blog changed to the basic operation of the database table, formerly called the SQL statement Daquan, feeling with "Daquan" this noun is too big, and the

From: http://www.2cto.com/database/201206/134514.html 0. Create a database tableMysql> create database if not exists my_db default charset utf8 COLLATE utf8_general_ci;# Pay attention to the following sentence "COLLATE utf8_general_ci", which

Oracle is a database management system, which is a relational database management system. Usually we call the "database", contains the physical data, database management system, memory, operating system of the composition of the process, refers to

December 21, 2007 At the beginning of the delivery and use of information systems, the database table structure is often designed with clear logic structures and the management usersHowever, when the information system project is running for a

ArticleDirectory Solution 3 1. Process of splitting file batches In a recent project, because the amount of data calculated every day is too large, databases need to be stored in sub-databases. When the data is distributed to

The ORACLE tutorial is: several methods to optimize the design of Oracle database tables. Preface Most Oracle Database performance problems are caused by unreasonable Database design. Only a small number of problems are rooted in the unreasonable

MySQL Database sub-Library sub-table scheme, once the database is too large, especially when the write is too frequent, very difficult to be supported by a host, we will still face the expansion bottleneck. At this point, we have to find other

Implementation principle of DB database horizontal segmentation-Database Sharding, table sharding, master/slave, cluster, and server load balancer bitsCN.com Chapter 2 Introduction With the popularization of Internet applications, the storage and

Constraints* The constraint is added to the column, to constrain the column!1. PRIMARY KEY constraint (unique identifier)Non-empty * * *Unique * * *Quoted * * * ** When a column of a table is designated as the primary key, the column cannot be empty