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1.安装pymysql
进入cmd,输入 pip install pymysql:
2.数据库建表
在数据库中,建立一个简单的表,如图:
3.简单操作
3.1查询操作
#coding=utf-8 #连接数据库测试 import pymysql #打开数据库 db = pymysql.connect(host="localhost",user="root",password="root",db="test") #使用cursor()方法获取操作游标 cur = db.cursor() #查询操作 sql = "select * from books" try: # 执行sql语句 cur.execute(sql) results = cur.fetchall() #遍历结果 for rows in results: id = rows[0] name = rows[1] price = rows[2] bookcount = rows[3] author = rows[4] print("id: {}, name: {}, price: {}, bookcount: {}, author: {}".format(id,name,price,bookcount,author)) except Exception as e: raise e finally: db.close()
运行结果:
3.2插入操作
#coding=utf-8 #插入操作 import pymysql db = pymysql.connect(host="localhost",user="root",password="root",db="test") cur = db.cursor() sql = """insert into books(id,bookname,price,bookCount,author) values (4,'三体',20,3,'刘慈欣')""" try: cur.execute(sql) #提交 db.commit() except Exception as e: #错误回滚 db.rollback() finally: db.close()
运行结果:
3.3更新操作
#coding=utf-8 #更新操作 import pymysql db = pymysql.connect(host="localhost",user="root",password="root",db="test") # 使用cursor()方法获取游标 cur = db.cursor() sql_update = "update books set bookname = '%s',author = '%s' where id = %d" try: cur.execute(sql_update % ("边城","沈从文",4)) #提交 db.commit() except Exception as e: #错误回滚 db.rollback() finally: db.close()
运行结果:
3.4删除操作
#coding=utf-8 #删除操作 import pymysql db = pymysql.connect(host="localhost",user="root",password="root",db="test") #使用cursor()获取操作游标 cur = db.cursor() sql_delete = "delete from books where id = %d" try: #向sql语句传递参数 cur.execute(sql_delete % (1)) #提交 db.commit() except Exception as e: #错误回滚 db.rollback() finally: db.close()
运行结果:
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白云岛资源网 Design By www.pvray.com
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