python使用pymysql实现操作mysql

import pymysql.cursors
 
# Connect to the database
connection = pymysql.connect(host='127.0.0.1',
               port=3306,
               user='root',
               password='zhyea.com',
               db='employees',
               charset='utf8mb4',
               cursorclass=pymysql.cursors.DictCursor)
 

import pymysql.cursors
 
config = {
     'host':'127.0.0.1',
     'port':3306,
     'user':'root',
     'password':'zhyea.com',
     'db':'employees',
     'charset':'utf8mb4',
     'cursorclass':pymysql.cursors.DictCursor,
     }
 
# Connect to the database
connection = pymysql.connect(**config)

from datetime import date, datetime, timedelta
import pymysql.cursors
 
#连接配置信息
config = {
     'host':'127.0.0.1',
     'port':3306,
     'user':'root',
     'password':'zhyea.com',
     'db':'employees',
     'charset':'utf8mb4',
     'cursorclass':pymysql.cursors.DictCursor,
     }
# 创建连接
connection = pymysql.connect(**config)
 
# 获取明天的时间
tomorrow = datetime.now().date() + timedelta(days=1)
 
# 执行sql语句
try:
  with connection.cursor() as cursor:
    # 执行sql语句，插入记录
    sql = 'INSERT INTO employees (first_name, last_name, hire_date, gender, birth_date) VALUES (%s, %s, %s, %s, %s)'
    cursor.execute(sql, ('Robin', 'Zhyea', tomorrow, 'M', date(1989, 6, 14)));
  # 没有设置默认自动提交，需要主动提交，以保存所执行的语句
  connection.commit()
 
finally:
  connection.close();

import datetime
import pymysql.cursors
 
#连接配置信息
config = {
     'host':'127.0.0.1',
     'port':3306,
     'user':'root',
     'password':'zhyea.com',
     'db':'employees',
     'charset':'utf8mb4',
     'cursorclass':pymysql.cursors.DictCursor,
     }
# 创建连接
connection = pymysql.connect(**config)
 
# 获取雇佣日期
hire_start = datetime.date(1999, 1, 1)
hire_end = datetime.date(2016, 12, 31)
 
# 执行sql语句
try:
  with connection.cursor() as cursor:
    # 执行sql语句，进行查询
    sql = 'SELECT first_name, last_name, hire_date FROM employees WHERE hire_date BETWEEN %s AND %s'
    cursor.execute(sql, (hire_start, hire_end))
    # 获取查询结果
    result = cursor.fetchone()
    print(result)
  # 没有设置默认自动提交，需要主动提交，以保存所执行的语句
  connection.commit()
 
finally:
  connection.close();

#!/usr/bin/python
#coding:gbk
import pymysql
from builtins import int

#将MysqlHelper的几个函数写出来

def connDB():               #连接数据库
  conn=pymysql.connect(host="localhost",user="root",passwd="zx69728537",db="student");
  cur=conn.cursor();
  return (conn,cur);

def exeUpdate(conn,cur,sql):        #更新或插入操作
  sta=cur.execute(sql);
  conn.commit();
  return (sta);

def exeDelete(conn,cur,IDs):        #删除操作
  sta=0;
  for eachID in IDs.split(' '):
    sta+=cur.execute("delete from students where Id=%d"%(int(eachID)));
  conn.commit();
  return (sta);
    
def exeQuery(cur,sql):           #查找操作
  cur.execute(sql);
  return (cur);
  
def connClose(conn,cur):          #关闭连接，释放资源
  cur.close();
  conn.close();

result=True;
print("请选择以上四个操作：1、修改记录，2、增加记录，3、查询记录，4、删除记录.(按q为退出)");
conn,cur=connDB();
number=input();
while(result):
  if(number=='q'):
    print("结束操作");
    break;
  elif(int(number)==1):
    sql=input("请输入更新语句：");
    try:
      exeUpdate(conn, cur, sql);
      print("更新成功");
    except Exception:
      print("更新失败");
      raise;
  elif(int(number)==2):
      sql=input("请输入新增语句:");
      try:
        exeUpdate(conn, cur, sql);
        print("新增成功");
      except Exception:
        print("新增失败");
        raise;
  elif(int(number)==3):
    sql=input("请输入查询语句：");
    try:
      cur=exeQuery(cur, sql);
      for item in cur:
        print("Id="+str(item[0])+" name="+item[1]);
    except Exception:
      print("查询出错");
      raise;
  elif(int(number)==4):
    Ids=input("请输入Id，并用空格隔开");
    try:
      exeDelete(conn, cur, Ids);
      print("删除成功");
    except Exception:
      print("删除失败");
      raise;
  else:
    print("非法输入，将结束操作!");
    result=False;
    break;
  print("请选择以上四个操作：1、修改记录，2、增加记录，3、查询记录，4、删除记录.(按q为退出)");
  number=input("请选择操作");