Python|Python连接MySQL数据库方法介绍（超详细！手把手项目案例操作）( 三 ) 作者|CDA数据分析师来源|CDA数据

self.cur.execute(sql)
self.db.commit()
print("ok")
except Exception as e:
self.db.rollback()
print("Failed", e)
self.close()
# 数据库查询所有操作方法:
def Search(self, sql):
try:
self.open()
self.cur.execute(sql)
result = self.cur.fetchall()
return result
except Exception as e:
print("Failed", e)
self.close()
def Insert():#如何从外面将数据录入到sql语句中
ID = int(input("请输入球员编号："))
people_name = input("请输入球员名字：")
PAC = int(input("请输入速度评分："))
DRI = int(input("请输入盘带评分："))
SHO = int(input("请输入射门评分："))
DEF = int(input("请输入防守评分："))
PAS = int(input("请输入传球评分："))
PHY = int(input("请输入身体评分："))
score =(PAC+DRI+SHO+DEF+PAS+PHY)/6
sql_insert = "insert into FIFA(ID, people_name, PAC,DRI,SHO,DEF, PAS, PHY, score) values(%d,'%s',%d,%d,%d,%d,%d,%d,%d)"%(ID, people_name, PAC,DRI,SHO,DEF, PAS, PHY, score)
print(people_name)
return sql_insert
def Project():
print("球员的能力评分有：")
list=['速度','盘带','射门','防守','传球','身体','综合']
print(list)
def Exit():
print("欢迎下次使用!!!")
exit()
def Search_choice(num):
date = Mysqlpython()
date.open()
if num=="2":
# 1.增加操作
sql_insert = Insert()
date.Operation(sql_insert)
print("添加成功！")
Start()
elif num=="1":
# 2.查找数据,其中order by 是为了按什么顺序输出， asc 是升序输出， desc降序输出
input_date=input("请选择您想要以什么格式输出：默认升序排列1.球员编号， 2.速度， 3.盘带， 4.射门，5.防守，6.传球，7.身体，8.综合 ")
if input_date=="1":
sql_search = "select * from FIFA order by ID asc"
elif input_date=="2":
sql_search = "select * from FIFA order by PAC asc"
elif input_date=="3":
sql_search = "select * from FIFA order by DRI asc"
elif input_date=="4":
sql_search = "select * from FIFA order by SHO asc"
elif input_date=="5":
sql_search = "select * from FIFA order by DEF asc"
elif input_date=="6":
sql_search = "select * from FIFA order by PAS asc"
elif input_date=="7":
sql_search = "select * from FIFA order by PHY asc"
elif input_date=="8":
sql_search = "select * from FIFA order by PHY score"
else:
print("请重新输入！")
result = date.Search(sql_search)
print(" 编号姓名速度盘带射门防守传球身体综合 ")
for str in result:
print(str)
Start()
elif num=="3":
Project()
Start()
elif num=="4":
del_num=input("请输入您要删除球员的编号：")
sql_delete="delete from FIFA where id=%s"%del_num
date.Operation(sql_delete)
print("删除成功！")
Start()
elif num=="5":
Exit()
else:
print("输入有误，请重新输入！")
def Start():
print("********************************************************")
print("* 欢迎来到FIFA球员信息系统 *")
print("*1.查看球员信息 2.球员信息录入 *")
print("*3.球员能力 4.删除球员信息 *")
print("*5.退出系统 *")
print("********************************************************")
choice = input("请输入您的选择：")
Search_choice(choice)
if __name__=="__main__":
Start()
银行转账系统
先建立数据库test_3和表bankdata
import pymysql
config = {
'host': '127.0.0.1',
'port': 3306,
'user': 'root',
'passwd': 'password',
'charset':'utf8',
}
conn = pymysql.connect(**config)
cursor = conn.cursor()
try:
# 创建数据库
DB_NAME = 'test_3'
cursor.execute('DROP DATABASE IF EXISTS %s' %DB_NAME)
cursor.execute('CREATE DATABASE IF NOT EXISTS %s' %DB_NAME)
conn.select_db(DB_NAME)
#创建表
TABLE_NAME = 'bankData'
cursor.execute('CREATE TABLE %s(id int primary key,money int(30))' %TABLE_NAME)
# 批量插入纪录
values = []
for i in range(20):
values.append((int(i),int(156*i)))
cursor.executemany('INSERT INTO bankData values(%s,%s)',values)
conn.commit()
# 查询数据条目
count = cursor.execute('SELECT * FROM %s' %TABLE_NAME)
print ('total records:{}'.format(cursor.rowcount))
# 获取表名信息
desc = cursor.description
print ("%s %3s" % (desc[0][0], desc[1][0]))
cursor.scroll(10,mode='absolute')
results = cursor.fetchall()
for result in results:
print (result)
except:
import traceback
traceback.print_exc()
# 发生错误时会滚
conn.rollback()
finally:
# 关闭游标连接
cursor.close()
# 关闭数据库连接