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From 123-CBT Computer Based Training
Oracle SQL for End Users--Part 2
...rm calculations on a group of numeric values by using the AVG and SUM group functions in a query. Return the number of rows in a specified group by using the COUNT group function in a query. Manage null values when using group functions in a SQL statement. Group rows retrieved by using the GROUP BY clause. Identify illegal queries involving group functions. Unit 3: Subqueries
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...rm calculations on a group of numeric values by using the AVG and SUM group functions in a query. Return the number of rows in a specified group by using the COUNT group function in a query. Manage null values when using group functions in a SQL statement. Group rows retrieved by using the GROUP BY clause. Identify illegal queries involving group functions. Unit 3: Subqueries
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