Introduction and advanced MySQL (III)

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1、 Server introduction

The server ： A server is a kind of computer , It runs faster than a normal computer 、 Higher load 、 The price is more expensive. . The server is in the network for other clients （ Such as PC machine 、 A smart phone 、ATM And so on terminal even train system and so on large equipment ） Provide computing or application services . The server has high speed CPU Computing power 、 Long time reliable operation 、 Powerful I/O External data throughput and better scalability . According to the services provided by the server , Generally speaking, the server has the ability to respond to service requests 、 To undertake services 、 The ability to guarantee services . Servers as electronic devices , Its internal structure is very complex , But it's not much different from the internal structure of ordinary computers , Such as ：cpu、 Hard disk 、 Memory , System 、 System bus, etc .

2、MYSQL Relationship with server

The server ： Hardware server : cpu、 Hard disk 、 Memory , System 、 Computer host composed of system bus
Software server ：
1.web The server ：tomcat.
2. database server ：MySQL

We installed it today MySQL In fact, a MySQL The server
We connect mysql It's the connection MySQL Service for .

3、MySQL Detailed explanation of connection configuration

Host or ip Address ： localhost This is a ip Address And it indicates that we are currently connected to the address of this machine , because localhost It stands for 127.0.0.1
Port number : 3306 At present MySQL The port number of the service

Ip Address + Port number Socket called network programming

4、 summary

1.MySQL It's a safe 、 Cross platform 、 efficient , And with PHP、Java And other mainstream programming languages . The database system is developed by Sweden MySQL AB Companies to develop 、 Publish and support , from MySQL The initial developer David Axmark and Michael Monty Widenius On 1995 Established in .
2.MySQL The symbol of is a bird named Sakila Of dolphins , Represents the MySQL The speed of the database 、 Ability 、 The essence of precision and excellence .
3. at present MySQL Widely used in Internet Small and medium-sized websites on . Because of its small size 、 Fast 、 Low total cost of ownership , Especially open source , Many companies have adopted MySQL Database to reduce costs .
4.MySQL The database can be called the fastest running SQL One of the language databases . In addition to having many functions that other databases do not have ,MySQL Database is also a completely free product , Users can download directly through the network MySQL database , Without paying any fees .