Why is relationship created between multiple tables.
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The answer is to split our data up across multiple different tables, and create relationships between them. The process of splitting up data in this way to remove duplication and improve data integrity is known as normalization.
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When you use related tables in a query, the relationship lets Access determine which records from each table to combine in the result set. A relationship can also help prevent missing data, by keeping deleted data from getting out of synch, and this is called referential integrity....
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