... Security . ... See how an attacker can tamper with an SQL query . ... Applications should never connect to the database as its owner or a superuser, because these users can execute any query at will, for example, modifying the schema (e.g. dropping tables) or deleting its entire content. ... The well-known example for the hashing is storing the MD5 hash of a password in a database, instead of the password itself. ... Example 4-5. ... SQL UPDATEs are also subject to attacking your database. ...