Python3 pymysql入门简单操作(附源码)

import pymysql

#  创建连接
conn = pymysql.connect(
    host = 'localhost',
    port = 3306,
    user = 'root',
    passwd= '123456',
    db   = 'book',
    charset = 'utf8'
)
#  实例化游标
cur = conn.cursor()

sql_dict = {
    'show':'show databases',
    'creat':'create table stu (id INT PRIMARY KEY ,name CHAR (10),addr CHAR (15));',
    'insert':"insert into stu(id,name,addr) VALUE (1,'XXX','XXXXX'),(2,'XXX','XXXXX');",
    'select':'select * from stu;',
    'update':"update stu set addr='  ' where id=2;",
    'delete':"delete from stu where id=1;",
    'drop':'drop table stu;'
}

# #  执行SQL语句
# cur.execute(sql_dict['show'])
# #  获取所有数据
# datas = cur.fetchall()
# for db_info in datas:
#     print(db_info)
#  创建表格
# try:
#     cur.execute(sql_dict['creat'])
#     conn.commit()
#     print("创建成功!")
# except:
#     print("表格已存在!")
#  插入数据
# try:
#     cur.execute(sql_dict['insert'])
#     conn.commit()
#     print("添加成功!")
# except:
#     print("数据已存在!")
#     conn.rollback()  #  回滚
#  更新数据
# cur.execute(sql_dict['update'])
# conn.commit()
#  删除数据
# try:
#     cur.execute(sql_dict['delete'])
#     conn.commit()
#     print("删除成功!")
# except:
#     conn.rollback()
#     print("没有id为1的数据！")
# #  查询所有数据
# cur.execute(sql_dict['select'])
# #  获取所有数据
# dbs = cur.fetchall()
# for db_info in dbs:
#     print(db_info)
#  获取一条数据
# db = cur.fetchone()
# print(db)
#  获取多条数据
# dbs = cur.fetchmany(2)
# for db_info in dbs:
#     print(db_info)
#  关闭游标
cur.close()
#  关闭连接
conn.close()