Module 13 (Introduction to SQL - Part 2).pdf
Module 13 (Introduction to SQL - Part 2).pdf
Module 13 (Introduction to SQL - Part 2).pdf
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One-To-OneOne-<strong>to</strong>-One: A record from the left-hand table isexpected <strong>to</strong> match exactly one record from theright-hand table. This is how we would do“vertical partitions”.Except for vertical partition situations (forexample, where we might keep information forwidespread access about an employee (like nameand department) in one table, and privateinformation in another (like salary and SSN), theone-<strong>to</strong>-one situation is relatively rare.