Explanation:
उह्ह्नमजज्ल्ह्ह्बनुतनकुहक्जो
Answer:
Please see the attached file for complete answer.
Explanation:
Answer:
The statement is as follows:
Explanation:
We had better avoid such correlated subqueries by instead using aggregation with GROUP BY:
SELECT
c.email_address,
COUNT(DISTINCT o.order_id) AS num_orders,
COALESCE(SUM(oi.quantity * (oi.item_price - oi.discount_amount)), 0) AS total_amount
FROM customers c
LEFT JOIN orders o
ON c.customer_id = o.customer_id
INNER JOIN order_items oi
ON o.order_id = oi.order_id
GROUP BY
c.customer_id,
c.email_address;
Answer:
Option C
Both A and B
Explanation:
Both technicians are right about what they say about wire brushes. wire brushes are usually made up of steel wire bristles. however, when high RPMs are involved, it is better to get some special types of brushes for that purpose. This is because the heat generated at high RPMs is great, and most times, damages the brush after prolonged use if it is not specially built for such speeds.
In addition that, some wire brushes have plastic hubs which help support the bristles and is usually attached to the motor.
Considering these, we can say that the Two technicians are right
