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Select distinct pub - PowerPoint PPT Presentation

Subqueries and Exists

Subqueries and Exists. Subqueries. A subquery is a SELECT statement that is used to aid data selection by being nested within another SQL query Are often used with in IN predicate A subquery is a binary logical check, True or False. Differences Between Subquery and Join.

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Select distinct pub - PowerPoint PPT Presentation

Subqueries and Exists