1. A method for accessing a database, comprising: receiving an update query, wherein the update query specifies an update column of a table included in the database, and further wherein the update query specifies a record in the table; identifying a challenge column associated with the update column; receiving a challenge value associated with the update query, wherein the challenge value is associated with the record; and responsive to the challenge value matching a corresponding value in the challenge column of the record, allowing the update query to execute on the database.