how to use rowcount in mysql using python

user_8169623 0
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We are implementing a database in a student record project. We want to see that how many rows are there in a table before and after deleting a row from a table. The code we tried is as follows:

1  roll=5
2  m = mysql.connector.connect(host='localhost', database='student',user='root', password='')
3  cur = m.cursor()
4  rc = cur.rowcount
5  print("%d"%rc)
6  e=cur.execute("DELETE FROM `acc_details` WHERE roll_No=%s" % roll)
7  print("%d"%cur.rowcount)

In the above code, the first rowcount in line 4 is giving -1 as the output and the rowcount in the last line is giving the no of rows that the table has after deleting a row.

Why is the first rowcount in line 4 give -1 as the output?

Any help shall be great.

rowcount mysql python
3 Answers

cursor.rowcount will output -1 until you have fetched all rows of the result. Unless you are using a buffered cursor, you should use cursor.fetchall() before getting the real number of rows.

user_41592340
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