By Terry Halpin, Ken Evans, Pat Hallock, Bill Maclean
This publication is for database designers and database directors utilizing Visio, that's the database part of Microsoft's visible Studio .NET for company Architects suite, additionally integrated in MSDN subscriptions. this can be the one advisor to this product that tells DBAs the best way to get their task performed. even supposing basically excited by software beneficial properties, the publication additionally presents an creation to info modeling, and comprises sensible suggestion on dealing with database tasks. The crucial writer was once this system supervisor of VEA's database modeling recommendations. ?·Explains find out how to version databases with Microsoft?® Visio for firm Architects (VEA), targeting device features.?·Provides a platform-independent creation to facts modeling utilizing either item position Modeling (ORM) and Entity courting Modeling (ERM), and contains sensible recommendation on dealing with database projects.?·Additional ORM versions, direction notes, and add-ins on hand on-line.
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Extra resources for Database Modeling with Microsoft Visio for Enterprise Architects
Sample text
Select the Mass object type and change the Type of its reference mode to Measurement. The verbalization of the reference scheme should now read "Every Mass value is measured in kg," as shown in Figure 4-3. Figure 4-3: If the reference scheme is unit-based, set its type to Measurement. This figure also includes an Object Types window in the lower left corner. To view this window, select Database > View > Object Types. This window provides a compact list of all the object types and their reference modes.
When a table shape is selected, its Database Properties window is also displayed. You can use this to set all the properties of the table. In the Categories section, an arrow to the left indicates which category is currently selected for editing. 3. Check that the Definition Category is selected. Now edit the Table 1 entry in the Physical name field to rename the table as "Patient". This change is immediately applied to the shape in the drawing window, as shown in Figure 3-35. Figure 3-35: Using the Entity shape to declare a table scheme.
Each role is connected by a line to the object type that plays it. If the role is mandatory for the object type, a black dot is added; otherwise the role is optional. For example, each patient must have a name, but needn't smoke or have allergies. The arrow-tipped bars over predicates depict uniqueness constraints. The uniqueness constraint over the first role of Patient has PatientName, indicates that if you populate this fact type with a set of fact instances, each patient number occurs there at most once.