I have developed an application that I was soley planning on using for internal use; however, the idea has come up to release it for general use (within my companies territory). The application has several tables, for example a members, products, categories, etc. My question is, should I have a unique member (or company) id and have all the rows held in each table. Or, have different tables for each company with a unique prefix, or have a completely seperate database for each company? The table that will hold the most data is the products table, around 1500+ products per company. Another concern of mine is security, would it be better to separate the data all together into separate tables or databases? Thanks!