March 2006
Intermediate to advanced
384 pages
7h 42m
English
Content preview from Refactoring Databases: Evolutionary Database Design
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Chapter 8Referential Integrity Refactorings
Referential integrity refactorings are changes that ensure that a referenced row exists within another table and/or that ensures that a row that is no longer needed is removed appropriately. The referential integrity refactorings are as follows:
• Add Foreign Key Constraint
• Add Trigger For Calculated Column
• Drop Foreign Key Constraint
• Introduce Cascading Delete
• Introduce Hard Delete
• Introduce Soft Delete
• Introduce Trigger For History
Add Foreign Key Constraint
Add a foreign key constraint to an existing table to enforce a relationship to another table.
Motivation
The primary reason to apply Add Foreign Key Constraint is to enforce data dependencies at the database level, ...
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