(一)数据库操作
1、创建数据库
create database 数据库名;
create database runoob;
2、选择数据库
use 数据库名;
use runoob;
3、删除数据库
drop database 数据库名;
drop database runoob;
(二)数值类型
(三)数据表
1、创建数据表
CREATE TABLE 数据表名 (字段名 字段类型);
CREATE TABLE `runoob_tbl`(
`runoob_id` INT UNSIGNED AUTO_INCREMENT,
`runoob_title` VARCHAR(100) NOT NULL,
`runoob_author` VARCHAR(40) NOT NULL,
`submission_date` DATE,
PRIMARY KEY ( `runoob_id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
2、删除数据表
DROP TABLE 数据表名 ;
DROP TABLE runoob_tbl ;
(四)数据操作
1、增
INSERT INTO table_name ( field1, field2,...fieldN )
VALUES
( value1, value2,...valueN );
INSERT INTO runoob_tbl (runoob_title, runoob_author, submission_date)
VALUES
("学习 PHP", "菜鸟教程", NOW());
2、删
DELETE FROM table_name [WHERE Clause];
DELETE FROM runoob_tbl WHERE runoob_id=1;
3、改
UPDATE table_name SET field1=new-value1, field2=new-value2
[WHERE Clause];
UPDATE runoob_tbl SET runoob_title='学习 C++' WHERE runoob_id=1;
4、查
SELECT field1, field2,...fieldN FROM table_name1, table_name2...
[WHERE condition1 [AND [OR]] condition2.....
SELECT * from runoob_tbl WHERE runoob_author='菜鸟教程';