1. A method, comprising: detecting database activity by a database activity monitor (DAM) that is collocated with a database server for which it performs monitoring, wherein the database activity includes an attempt to execute a statement in a script, and wherein the statement includes a plurality of instructions for executing the database activity; validating a signature by parsing the statement to determine whether the statement includes the signature, wherein an association is generated between the signature and the statement in order to distinguish authorized database activity from unauthorized database activity, and wherein different rules are defined for handling the authorized database activity and the unauthorized database activity; and evaluating the statement as a signed statement if the signature is valid, wherein the signed statement is indicative of a planned, preapproved database activity that has been authorized.