MySQL Basics

Basic concepts of database

Why study database ？

What is a database ？

The benefits of databases ？

MySQL Database introduction

database 、 Data sheet 、 Introduction to the relationship between data

database

Data sheet

data

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Basic concepts of database

Why study database ？

In order to better manage data

We used IO flow , But such a set of operation is too troublesome , And too often IO Reading and writing , Data interaction between memory and hard disk , It will reduce the efficiency of the system ！

What is a database ？

• A warehouse for storing and managing data

• The English word is ：DataBase, abbreviation DB

The benefits of databases ？

• Data can be stored persistently

• Easy to store and manage data

• Using a unified way to operate the database -- SQL

MySQL Database introduction

• Small database

• Free open source (6 Free before version )

• Belong to Oracle company

It is recommended to use SQLyog Yes MySQL Database management ！

Crack as follows ,emmmmm If the failure of the change, please think of another way , Proposed installation 12.0.8 edition

Ultimate edition : （ The ultimate is the best ）
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database 、 Data sheet 、 Introduction to the relationship between data

database

For storing and managing data Warehouse

A library Can contain more than one Data sheet

Data sheet

One of the most important components of the database

It consists of vertical columns and horizontal rows ( similar excel form )

You can specify column names 、 data type 、 Constraints etc.

Multiple pieces of data can be stored in a table

data

to want to Permanently stored data

It can be more vividly understood as ： A database is a folder , The data table is Excel surface , Data is data in the table .