Introduction to easyclick database

EasyClick And Database introduction

A database is a warehouse for storing and managing data , Data is stored in a certain format , Users can add data to the database 、 modify 、 Delete 、 Query and so on .

Classification of database

• Relational database
• Non relational database

Relational database :

A database that uses a relational model to organize data , Simply speaking , A relational model is a two-dimensional table model , like Excel The form in the file , Emphasize the use of tables to store data .

The core element of relational database

• data row
• Data columns
• Data sheet
• database ( Set of data tables )

Common relational databases

• Oracle
• Microsoft SQL Server
• MySQL
• SQLite

Non relational database

Non relational database , Also known as NoSQL（Not Only SQL ), It means more than SQL, Yes NoSQL The most common definition is “ Uncorrelated ”, emphasize Key-Value How to store data .

Commonly used non relational databases

• MongoDB
• Redis

The role of database

The function of database is to store and manage data , such as : The product list data we browsed on Jingdong website , These data will be stored in the database .

The characteristics of database

• Persistent storage
• Read and write very fast
• Ensure the validity of data

summary

• Database is a warehouse for storing and managing data , It is used for persistent storage and fast reading of data .
• Database can be divided into relational database and non relational database

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