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demo_python_mysql_alter_primary_key.py:
import mysql.connector mydb = mysql.connector.connect( host="localhost", user="yourusername", passwd="yourpassword", database="mydatabase" ) mycursor = mydb.cursor() mycursor.execute("ALTER TABLE customers ADD COLUMN id INT AUTO_INCREMENT PRIMARY KEY") #If this page is executed with no error, the table "customers" now has a primary key
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:/home/python#python demo_python_mysql_alter_primary_key.py