import pymysql

# 创建数据库连接
db = pymysql.connect(
    host="localhost",
    user="root",
    passwd="123456",
    database="ai0824"
)
print('数据库连接成功!')

# 1.创建游标对象
cursor =db.cursor()
# 2.执行sql查询语句
# cursor.execute("select * from ai0824_student")
# results =  cursor.fetchall()
# for row in results:
#     print(row)
# print(f'获取的所有结果为:{results}')
# 3.执行sql插入语句
# sql = "insert into test0905 values(%s,%s)"
# l = [(1,'张三'),(2,'李四'),(4,'赵六')]
# cursor.execute(sql, l)
# cursor.executemany(sql, l)
# db.commit()
# 4.执行update更新语句
# sql = "update test0905 set name = %s where id = %s"
# values=('李四',2)
# cursor.execute(sql,('李四',2))
# db.commit()
# print(cursor.rowcount,'条记录更新成功')
# 5.执行sql删除语句
# sql = "delete from test0905 where id = %s"
# values= 2
# cursor.execute(sql,2)
# db.commit()
# print(cursor.rowcount,'条记录删除成功')

db.close()
cursor.close()
print("数据库连接已关闭!")