Python MySQL Update Table

Python MySQL Update Table

Update Table

You can update existing records in a table by using the “UPDATE” statement:

Example

Overwrite the address column from “Valley 345” to “Canyon 123”:

Run example »

Important!: Notice the statement: mydb.commit(). It is required to make the changes, otherwise no changes are made to the table.

Notice the WHERE clause in the UPDATE syntax: The WHERE clause specifies which record or records that should be updated. If you omit the WHERE clause, all records will be updated!


Prevent SQL Injection

It is considered a good practice to escape the values of any query, also in update statements.

This is to prevent SQL injections, which is a common web hacking technique to destroy or misuse your database.

The mysql.connector module uses the placeholder %s to escape values in the delete statement:

Example

Escape values by using the placeholder %s method:

Run example »

ArmenianEnglish