Company: Dulcian, Inc. Biography Michael Rosenblum is a Development Database Administrator at Dulcian. He is responsible for system tuning and application architecture. He supports Dulcian developers by writing complex PL/SQL routines and researching new features. Rosenblum is a coauthor of "PL/SQL for Dummies" (Wiley Press) and is a frequent presenter at various regional and national Oracle users group conferences.