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Figure 6.1 Schematic view of query processing. - PowerPoint PPT Presentation


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Figure 6.1 Schematic view of query processing. Figure 6.2A Examples of set operators. Figure 6.2B (continued) Examples of set operators. Figure 6.2C (continued) Examples of set operators. Figure 6.3 Two relations and their Cartesian product.

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Figure 6.1Schematic view of query processing.


Figure 6.2AExamples of set operators.


Figure 6.2B (continued)Examples of set operators.


Figure 6.2C (continued)Examples of set operators.


Figure 6.3Two relations and their Cartesian product.


Figure 6.3B (continued)Two relations and their Cartesian product.


Figure 6.4Join of relations in Figure 6.3.


Figure 6.5Division operator.


Figure 6.6Anatomy of a Query: Courses taught by every computer science professor.


Figure 6.7SQL aggregate functions.


Figure 6.8Effect of the GROUP BY clause.


Figure 6.9Query evaluation with aggregate functions.


Figure 6.10Process of query modification by views..


Figure 6.11SQL’s truth tables used to deal with the unknown.


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