| # Task: 013 |
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| **Database:** retails |
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| ## Question |
| Show the total quantity and total final charge of all items shipped by mail or with discount greater than 5% and returned. |
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| ## Gold Query |
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| ```sql |
| SELECT |
| SUM(l_quantity) AS total_quantity, |
| SUM(l_extendedprice * (1 - l_discount) * (1 + l_tax)) AS total_charge |
| FROM lineitem |
| WHERE l_returnflag = 'R' |
| AND (l_shipmode = 'MAIL' OR l_discount > 0.05); |
| ``` |
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| **Execution Result:** |
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| | total_quantity | total_charge | |
| |------------------|----------------| |
| | 9357125 | 1.3533437e+10 | |
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| *1 rows* |
