MySql developed using common statement ------ JDBC

Library operations

 

Create a database: create database [database name];

Creating a character set of the database: create database [library name] CHARACTER SET = uft8;

The database created with parity: create database [library name] CHARACTER SET = uft8 COLLATE utf8_general_ci;

Show Database: show databases;

Delete the database: drop databases [library name];

Modify the database code: ALTER DATABASE [library name] set [coding];

 

Operating Table

（例 ： id、name、sex)

create table [表名]
(
    id int,
    name varchar[99],
    sex char[4],
)  

Delete tables: drop table [table name]

 

increase:

insert into 【表名】(id,name,sex) values(1,'zhangsan','male');

delete:

Remove the table, "???" Data: delete from [table] where id = '???';

Delete all the data in the table: delete from [table name];

Use truncate delete records in the table: truncate table [table name];

check:

All information query: select id, name, sex from [table name];

Query specified id: select * from [table name] where id = "??";

90 is greater than the query: select * from [table] where id> 90;

Query greater than 90 less than 100 from [table] where id> 90 and id <100;

change:

Modify all the attribute value: update [table] set attribute =? ? ? ;

Modify specific properties: update [table] set attribute =? ? ? where name = specified;

Common MySQL command statement

Enter the mysql command line: mysql -uroot -p;

View all databases: show databases;

Create a database: create database niu charset utf8;

Delete the database: drop database niu;

Select the database: use databases;

View all the tables: show tables;

View create a database statement: show create database databasename;

View table creation statement: show create table tablename;

View table structure: desc tablenmae;

New field to the table: alter table [table] 

[field name] [add properties]