import pymysql 
# 打开数据库连接 
db = pymysql.connect("localhost","root","root","db_test01" ) 
# 使用cursor()方法获取操作游标  
cursor = db.cursor() 
# SQL 更新语句 
sql = "UPDATE EMPLOYEE SET AGE = AGE + 1 WHERE SEX = '%c'" % ('M') 
try: 
  # 执行SQL语句 
  cursor.execute(sql) 
  # 提交到数据库执行 
  db.commit() 
  print("update OK") 
except: 
  # 发生错误时回滚 
  db.rollback() 
# 关闭数据库连接 
db.close() 
 

update OK