Using Java and SQLite database: I want to pass values using

Question

Using Java and SQLite database: I want to pass values using

a function and UPDATE these values passed in the database for that particular record only.

Query:

db.execSQL (" UPDATE table_name SET col_name1 = ? WHERE col_name2 = ? ", new String [ ] { val1, val2} );

Where is the mistake? Because this doesn't update the record in the database.