sql   In the orders table, group by ship_via, employee_id, ship_country fields, where the ship_via is less than the employee_id and (condition 1) the ship_country does not end in the letter 'y'(CI) or 'L' (CI) or (condition 2) the employee_id is 4. For each grouping, return the count of the number of items as total and the average freight as avg_fr. Return groupings with avg_fr greater than 30, a total greater than 7, and sort the results by total descending.

Computer Networking: A Top-Down Approach (7th Edition)
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In the orders table, group by ship_via, employee_id, ship_country fields, where the ship_via is less than the employee_id and (condition 1) the ship_country does not end in the letter 'y'(CI) or 'L' (CI) or (condition 2) the employee_id is 4.

For each grouping, return the count of the number of items as total and the average freight as avg_fr. Return groupings with avg_fr greater than 30, a total greater than 7, and sort the results by total descending.

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