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SQL: The Query Language Part 2

SQL: The Query Language Part 2. R & G - Chapter 5 . Reserves. Example Instances. Sailors. Boats. Queries With GROUP BY. To generate values for a column based on groups of rows, use aggregate functions in SELECT statements with the GROUP BY clause.

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357 views • 28 slides

Review Session

Review Session. ER and Relational ER ? Relational Constraints, Weak Entities, Aggregation, ISA Relational Algebra ? Relational Calculus Selections/Projections/Joins/Division SQL (Division, Outer-Joins, Constraints) Your questions. ER & Relational Review.

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259 views • 19 slides

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Group by s - PowerPoint PPT Presentation

SQL: The Query Language Part 2

Review Session