Why Are My MySQL Updates Not Committing in Python?

Troubleshooting MySQL Update Query in Python

In Python, when performing an update operation on a MySQL database using the MySQLdb module, it's crucial to commit changes to ensure they are persisted successfully. Otherwise, updates may appear to execute but not actually modify the database.

Consider the following code:

<code class="python">dbb = MySQLdb.connect(host="localhost", user="user", passwd="pass", db="database")
curb = dbb.cursor()
curb.execute("UPDATE RadioGroups SET CurrentState=1 WHERE RadioID=11")
print "Row(s) were updated :" + str(curb.rowcount)
curb.close()</code>

While the code above correctly fetches and prints the number of affected rows, the database itself remains unchanged. To commit the changes and make them permanent, add the following statement after executing the update query:

<code class="python">dbb.commit()</code>

This line instructs the MySQL server to finalize all pending modifications and apply them to the database. Without this step, any updates made within the cursor session will not persist once the cursor is closed.

Remember, committing changes is essential for all SQL operations that modify data, such as INSERT, UPDATE, and DELETE. By including dbb.commit();, you ensure that your changes are permanently reflected in the database.

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