Why the need to commit explicitly when doing an UPDATE?

Question

Here\'s my code:

import cx_Oracle

conn = cx_Oracle.connect(usr, pwd, url)
cursor = conn.cursor()
cursor.execute(\"UPDATE SO SET STATUS=\'PE\' WHERE ID=\'100         


        

Answer 1

commit is used to tell the database to save all the changes in the current transaction.

Select does not change any data so there is nothing to save and thus nothing to commit

See wikipedia for transactions