【MySQL】Basic operation of MySQL! !

• Create database: capital letters are keywords; options in [] are optional options;
  CREATE DATABASE [IF NOT EXISTS] db_name [create_specification [, create_specification] ...]

  
  
  

• Use validation rules when creating libraries

  utf8_general_bin : case sensitive
  utf8_general_ci : case insensitive

• create table

create table 表名(   
 字段1 列类型1,  
 字段2 列类型2,    
 ...    
 字段n 列类型n );

• insert data into the table

insert into 表名(字段名1, 字段2, ...) values(values1, value2);

• View the data in the table

select * from 表名

• Check the character sets supported by the database

show  charset；

• View the statement to create the database

show create database 数据库名；

• delete database

DROP DATABASE [IF EXISTS] db_ name;

For example, delete the test database

• database modification

 ALTER DATABASE [IF EXISTS] db_name [alter_spacification [,alter_spacification]...]

Note: The modification of the database is mainly aimed at the character set and verification rules of the approval database

• table modification

ALTER TABLE  tablename ADD (column datatype [DEFAULT expr][,column datatype]...); 

ALTER TABLE  tablename MODIfy (column datatype [DEFAULT expr][,column datatype]...); 

ALTER TABLE  tablename DROP (column);