庫的相關操作
– 查看已有庫
SHOW DATABASES;
SHOW DATABASES;
SHOW DATABASES\G
– 新建庫的操作
CREATE DATABASE 庫名;
CREATE DATABASE `ET`;
– 查看建庫信息
SHOW CREATE DATABASE 庫名;
SHOW CREATE DATABASE `ET`;
– 把一個庫設置爲默認庫
USE 庫名;
USE ET;
– 刪除庫
DROP DATABASE 庫名;
DROP DATABASE ET;
表相關操作
– 建表
CREATE TABLE 表名 (列名 列類型, …, 列名 列類型);
CREATE TABLE students (
id INT,
name VARCHAR(30),
idcard CHAR(18)
);
– 查看有默認庫下有哪些表
SHOW TABLES;
SHOW TABLES;
– 查看建表信息
SHOW CREATE TABLE 表名;
DESC 表名;
SHOW CREATE TABLE students;
DESC students;
– 刪表
DROP TABLE 表名;
DROP TABLE students;
– 修改表名稱
RENAME TABLE 舊錶名 TO 新表名;
RENAME TABLE students TO ET_students;
– 插入數據
INSERT INTO students (id, name,idcard) VALUES
(1,"張三",111);
– 修改數據
UPDATE students SET name = '張三' WHERE id = 2;
– 查詢
SELECT * FROM students WHERE name = '張三';
– 刪除
DELETE FROM students WHERE name = '張三';