MySQL mysql-connector的具体实现

import mysql.connector 

-- 示例：创建用户user_test，允许IP为xx.xx.xxx.xxx的主机远程访问
CREATE USER 'user_test'@'xx.xx.xxx.xxx' IDENTIFIED BY '你的复杂密码';

CREATE USER 'user_test'@'%' IDENTIFIED BY '你的复杂密码'; 

-- 示例：授予用户对所有数据库的所有操作权限（可根据需求缩小权限范围）
GRANT ALL PRIVILEGES ON *.* TO 'user_test'@'xx.xx.xxx.xxx' WITH GRANT OPTION;

FLUSH PRIVILEGES;

import mysql.connector
mydb = mysql.connector.connect(host="localhost", user="root", passwd="123456")
mycursor = mydb.cursor()
mycursor.execute("CREATE DATABASE runoob_db")

mycursor.execute("SHOW DATABASES")
for x in mycursor:
    print(x)

mydb = mysql.connector.connect(
    host="localhost",
    user="root",
    passwd="123456",
    database="runoob_db"
)

mycursor.execute("CREATE TABLE sites (name VARCHAR(255), url VARCHAR(255))")

mycursor.execute("SHOW TABLES")
for x in mycursor:
    print(x)

sql = "INSERT INTO sites (name, url) VALUES (%s, %s)"
val = ("RUNOOB", "https://www.runoob.com")
mycursor.execute(sql, val)
mydb.commit()

val = [('Google','https://www.google.com'), ('Github','https://www.github.com')]
mycursor.executemany(sql, val)
mydb.commit()

mycursor.execute("SELECT * FROM sites")  # 所有字段
mycursor.execute("SELECT name, url FROM sites")  # 指定字段
myresult = mycursor.fetchall()  # 所有结果
for x in myresult: print(x)

sql = "SELECT * FROM sites WHERE name = %s"
mycursor.execute(sql, ("RUNOOB",))

sql = "DELETE FROM sites WHERE name = %s"
mycursor.execute(sql, ("stackoverflow",))
mydb.commit()

sql = "UPDATE sites SET name = %s WHERE name = %s"
mycursor.execute(sql, ("Zhihu", "ZH"))
mydb.commit()

mycursor.execute("DROP TABLE IF EXISTS sites") 
# IF EXISTS 避免表不存在报错