Home » Oracle » 1z0-071 v.2 » Which two can replace <clause> so the query completes successfully?
Examine the description of the ORDER_ITEMS table:
Examine this incomplete query:
Which two can replace <clause> so the query completes successfully? (Choose two.)
A. quantity, unit_price
B. quantity * unit_price
C. quantity
D. total_paid
E. product_id
Correct Answer: BD
Explanation/Reference:
Sample
SELECT tr_sub.cur_tt, tr_sub.item, sum(tr.quantity), sum(tr.quantity*tr.unit_price)
FROM
(SELECT tr1.transaction_time as cur_tt, max(tr2.transaction_time) as prev_tt, tr1.item as item, IF (tr1.unit_price=tr2.unit_price, tr1.unit_price, tr2.unit_price) as t_p FROM transactions tr1 LEFT JOIN transactions tr2 ON tr1.transaction_time>=tr2.transaction_time AND tr1.item=tr2.item GROUP BY tr1.item, tr1.transaction_time, t_p
Reference: https://stackoverflow.com/questions/50771172/sql-query-get-total-value-based-on-different-unit-price-quantity-at-different-ti
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BD
BD
All the answers are correct