MySQL是一種關(guān)系型數(shù)據(jù)庫(kù)管理系統(tǒng)，廣泛應(yīng)用于各種互聯(lián)網(wǎng)應(yīng)用中。以下是MySQL的一些常用命令和操作：

//登錄
mysql -u root -p
//創(chuàng)建數(shù)據(jù)庫(kù)
CREATE DATABASE database_name;
//查詢所有數(shù)據(jù)庫(kù)
SHOW DATABASES;
//選擇數(shù)據(jù)庫(kù)
USE database_name;
//創(chuàng)建表
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
.....
);
//查詢表結(jié)構(gòu)
DESCRIBE table_name;
//插入數(shù)據(jù)
INSERT INTO table_name (column1, column2, column3, .....)
VALUES (value1, value2, value3, .....)
//查詢數(shù)據(jù)
SELECT column1, column2, column3, ....
FROM table_name
WHERE condition;
//更新數(shù)據(jù)
UPDATE table_name
SET column1 = value1, column2 = value2, ....
WHERE condition;
//刪除數(shù)據(jù)
DELETE FROM table_name WHERE condition;
//刪除表
DROP TABLE table_name;
//退出
exit