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Graphics Interchange Format  |  1998-02-10  |  33KB  |  583x447  |  4-bit (15 colors)

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OCR: Conceptual/Logical Physical/DDL ERwin S-Designor Designer/2000 Simple Entities Tables 1 1 1 Super and Sub-type Entities 1 Table + Check Constraint + 2 Views 0+0+0 1+1+0 1+1+0 OR 2 Tables + PK/UK Triggers + 1 View 1+0+0 1+0+0 1+0+0 OR 3 Tables + 2 Views 0+0 1+0 1+0 Entity Volumetrics Storage and Space Parameters 0 0 0 Attributes Columns 1 1 1 Attribute Type and Length Column Type and Length 0 1 1 Attribute Default Value Column Default Clause 1 1 1 Attribute Volummetrics Table Column Order 0 0 1 OR PK/UK Constraint Column Order 0+0 0+0 1+1 OR Index Column Order 0 1 Simple Relationships Foreign Keys 1 1 Composite Relationships Foreign Keys + Check Constraints 1+0 1+0 1+0 Primary Unique Identifier Primary Key Constraint 1 1 Secondary Unique Identifiers Unqiue Key Constraints 1 0 1 Data Access Paths Non-unique Indexes 1 0 Entity Validation Rule Table Check Constraint 0 0 OR Trigger 0 0 Attribute Values Range Column Check Constraint 1 1 1 Attribute Values List Column Check Constraint 1 1 1 Attribute Validation Rule Column Check Constraint 0 1 0 OR Trigger 0 1 Total Score (highest possible score = 29) 11 15 18 Figure 1: A CASE tool comparison; ERwin, S-Designor, and Designer/2000.

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