更新表中的已有记录

import mysql.connector
 
mydb = mysql.connector.connect(
  host="localhost",
  user="myusername",
  passwd="mypassword",
  database="mydatabase"
)
 
mycursor = mydb.cursor()
 
sql = "UPDATE customers SET address = 'Canyon 123' WHERE address = 'Valley 345'"
 
mycursor.execute(sql)
 
mydb.commit()
 
print(mycursor.rowcount, "record(s) affected")