Posted in Data Modeling, Database, ERwin, Technology, Training, Uncategorized | Leave a reply Data Modeling using ERWIN DATA MODELER – Online training %substr(%TableProp(TableType),1,1)_%EntityName() How can I do it?ġ) Create a table User Defined Property(UDP) with name ‘TableType’ of type list of values(PRIMARY,SECONDARY,LOOKUP,DIMENSION,FACT).Ģ) Select appropriate UDP value for each tableģ) Finally Apply following name mapping macro for table names: I also need table names prefixed with the first letter of its type. Question:I need to classify tables on a model into several types Eg:.If applied, fact tables should have “F_” prefixed and Dimension tables should have “D_” prefixed: %if( %=( %TLX(Property( “Dimensional_Notation_Role_Type” )),”Fact” ) ) %EntityName()
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How to do it? The following macro can prefix a customized text with table name based on its dimensional role type. I need to prefix all fact tables with F_ and all dimension tables with D_.Make sure you switch on “Generate As UDD” property with domain. In ERwin, such TYPE objects can be modeled using Domains. TYPE objects can be associated with many columns in a database. It is automatically inherited by attributes created from that Domain.įew databases support user defined TYPE objects that define a set of characteristics of columns. Any changes we would in future can be done only on Domain. Just drag a Domain on to an entity to create an attribute that automatically inherits all characteristics from corresponding Domain. Any change we make on Domain will be automatically propagated to associated attributes/columns.Īttributes that may appear in several entities can be defined as Domain objects and used on many entities/tables.
The advantage is, centralized management of common attributes.
These properties include data type, precision, scale, optionality (NULL-ability), constraints, definition etc.ĭomains can be created with a set of such properties and associated with many attributes / columns in the model. Domains can be used in three different senses:ģ) User defined types (TYPE objects in database)Įach attribute/column in ERwin model has a parent domain that supply data type and related properties to corresponding attributes.
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