TAILIEUCHUNG - Beginning Database Design- P15

Beginning Database Design- P15:This book focuses on the relational database model from a beginning perspective. The title is, therefore, Beginning Database Design. A database is a repository for data. In other words, you can store lots of information in a database. A relational database is a special type of database using structures called tables. Tables are linked together using what are called relationships. You can build tables with relationships between those tables, not only to organize your data, but also to allow later retrieval of information from the database | Planning and Preparation Through Analysis The ADVERTISEMENT table is decided on being the fact table. The MUSICIAN table is a single layer fact table. The BAND MERCHANDISE SHOWS and DISCOGRAPHY tables constitute a two-layer dimensional hierarchy. There are some gray areas between static and dynamic information in this situation. There are other ways of building this data warehouse database model. Project Management When it comes to planning and establishing timelines there are some remarkably good project-planning software tools available. When planning any software project including a database model design there is often more than one person involved in a project. This excludes the planner. If not using a software tool and multiple people are to perform multiple overlapping interdependent tasks you could end up with lots of drawings and an awfully full garbage can. These things change. Plans can change. People get sick and go on vacation. They find new jobs. Sometimes people simply don t show up at all In other words expect things to change. The fact is when it comes to planning establishing timelines and budgeting there is no enforceable or reasonably useful applicable set of rules and steps. It just doesn t exist. In any planning process including budgeting for any type of project there is no way to accurately predict to any degree of mathematical certainty. None of us can really read the future. Planning establishing timelines and budgeting entail a flexible process which is almost entirely dependant on the expertise and past experience of the planner. And then again if changes and unexpected snags or events are not anticipated a project can very quickly spiral out of control. Project Planning and Timelines A software development company can meet with its financial demise by not allowing enough time in project plans. It is quite common in the software development field for project-tender budgets from multiple companies to be as much as 50 times different. In .

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