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Aggregating Data Using Group Functions

Aggregating Data Using Group Functions. What Are Group Functions?. EMP. Group functions operate on sets of rows to give one result per group. DEPTNO SAL --------- --------- 10 2450 10 5000 10 1300 20 800 20 1100

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Subqueries

Subqueries. Objectives. After completing this lesson, you should be able to do the following: Describe the types of problems that subqueries can solve Define subqueries List the types of subqueries Write single-row and multiple-row subqueries. Using a Subquery to Solve a Problem.

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Aggregating Data Using Group Functions

Subqueries