python execute many with “on duplicate key update”?

Question

I am trying to executemany in python with on duplicate key update, with the following script:

# data from a previous query (returns 4 integers in each row)
r         


        

Answer 1

When you write sql like following:

sql = insert into A (id, last_date, count) values(%s, %s, %s) on duplicate key update last_date=%s, count=count+%s'

You will get the following error: TypeError: not all arguments converted during string formatting.

So when you use "ON DUPLICATE KEY UPDATE" in python, you need to write sql like this:

sql = 'insert into A (id, last_date, count) values(%s, %s, %s) on duplicate key update last_date=values(last_date),count=count+values(count)'