Database triggers or change data capture frameworks actively replicate every change from the original system to the shadow table, ensuring data integrity.

Learn how to add and remove Primary Keys from an Access database table. The primary key's purpose is to promptly associate data from multiple tables and combine that data.

How to Select a Subset in MySQL. The Structured Query Language, used in the MySQL database, has great flexibility for selecting subsets of data from database tables. SQL's SELECT statement shows ...