How to add a where clause in a MySQL Insert statement?

Question

This doesn\'t work:

INSERT INTO users (username, password) VALUES (\"Jack\",\"123\") WHERE id=\'1\';

Any ideas how to narrow insertion to a

Answer 1

To add a WHERE clause inside an INSERT statement simply;

INSERT INTO table_name (column1,column2,column3)
SELECT column1, column2, column3 FROM  table_name
WHERE column1 = 'some_value'