The SQL COUNT function is an aggregate function used to count rows.  Use it alone within a SELECT statement to return a count of all rows within

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SQL COUNT Function

Use the Approximate Count Distinct function, APPROX_COUNT_DISTINCT, to return an estimate distinct count of values withing rows. It is best suited for

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SQL APPROX_COUNT_DISTINCT Function

The SQL MIN function returns the smallest value within a table or group.  Throughout this section we’ll use the HumanResource.Employee table for our examples:  Using the

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SQL MIN Function

The SQL MAX function returns the largest value within a table or group. In this section, we’ll use the HumanResource.Employee table for our examples:  Using the data above, MAX calculates

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SQL MAX Function

The SQL AVG function returns the average value within a table or group. In this section, we’ll use the HumanResource.Employee table for our examples: Using sample data above, AVG calculates

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SQL AVG Function