Database Overview

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• The concept of databases

  name	abbreviation
  database	DataBase（DB）
  Database management system	DataBase Management System（DBMS）
  SQL	Structured Query Language（SQL）

• MySQL Start of 、 stop it

  start-up ：

  net start mysql80 
  

  stop it ：

  net stop mysql80
  

  (PS：mysql80 by Win Sign up to MySQL System service name in )

• MySQL Connection of the client

  Use WIn Of cmd Command line connection ：

  mysql [-h 127.0.0.1] [-p 3306] -u root -p 123
  

  (PS：-h Specify the address 、-p Designated port 、-u Specify user name 、-p Specified password )

• Relational database （RDBMS）

  Concept ： Based on the relational model , A database consisting of multiple connected binary tables .

  characteristic ：

  1. Use tables to store data , use the same pattern , Easy to maintain ;
  2. Use SQL Statement operation , Unified standards , Easy to use ;

• Data model

  client ——> Database management system （DBMS）——> database