8-23. Lock Modes

Need more info on these locking modes (though we often don't use it since they are automatically obtained):

• ROW SHARE
• ROW EXCLUSIVE
• SHARE
• SHARE ROW EXCLUSIVE
• EXCLUSIVE

Explicación extensa de Oracle: http://youngcow.net/doc/oracle10g/server.102/b14220/consist.htm

Intento de explicación (cualquier cosa): http://mioracle.blogspot.com/2008/03/bloqueo-base-de-datos.html