Python 3.6 Mysql 데이터 베 이 스 를 간단하게 조작 하 는 세 가지 인 스 턴 스

import pymysql
#     
#            ，   ，  ，   
conn = pymysql.connect(host='127.0.0.1', user='root', passwd='123456', db='demo')
#     
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
#            
effect_row = cursor.execute("select * from course")
print(effect_row)
#       
result = cursor.fetchall()
result = cursor.fetchone() #        
result = cursor.fetchone() #        （         ）
# cursor.scroll(-1, mode='relative') #       
# cursor.scroll(0,mode='absolute') #       
#   ，               
conn.commit()
#     
cursor.close()
#     
conn.close()

import pymysql
#     
conn = pymysql.connect(host='127.0.0.1', user='root', passwd='123456', db='demo')
#     
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
#        %s               
effect_row = cursor.execute("insert into course(cou_name,time) values(%s,%s)", ("Engilsh", 100))
print(effect_row)
conn.commit()
cursor.close()
conn.close()

import pymysql.cursors
# Connect to the database
connection = pymysql.connect(host='localhost',
        user='user',
        password='passwd',
        db='db',
        charset='utf8mb4',
        cursorclass=pymysql.cursors.DictCursor)
try:
 with connection.cursor() as cursor:
  # Create a new record
  sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
  cursor.execute(sql, ('[email protected]', 'very-secret'))
 # connection is not autocommit by default. So you must commit to save
 # your changes.
 connection.commit()
 with connection.cursor() as cursor:
  # Read a single record
  sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"
  cursor.execute(sql, ('[email protected]',))
  result = cursor.fetchone()
  print(result)
finally:
 connection.close()