1z0-071 Exam Dumps | Examine the description of the PROMOTIONS TABLE: You want to display the unique is promotion costs in

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Question 105/139

Examine the description of the PROMOTIONS TABLE:
You want to display the unique is promotion costs in each promotion category.
Which two queries can be used?

A. SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;

B. SELECT promo_cost, promo_category FROM promotions ORDER BY 1

C. SELECT promo_category, DISTINCT promo_cost FROM promotiong ORDER BY 2:

D. select DISTINCT promo_categoryIl 'has'||promol_cost as COSTS FROM promotions ORDER BY 1:

E. SELECT DISTINCT promo_cost ||'in'IIDISTINCT promo_category promotions ORDER BY1:

Correct Answer: A,D

For displaying unique promotion costs in each promotion category from the PROMOTIONS table:
* A: SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1: This query correctly retrieves unique combinations of promo_category and promo_cost, sorting the results based on the promo_category.
* D: SELECT DISTINCT promo_category || ' has ' || promo_cost AS COSTS FROM promotions ORDER BY 1: This query correctly combines the category and cost into a single string for each unique combination, using string concatenation and the DISTINCT keyword to ensure uniqueness, sorting by the concatenated string.
Incorrect options:
* B: This does not ensure that the combinations of promo_cost and promo_category are unique because DISTINCT was not specified for both columns together.
* C: The syntax is incorrect; DISTINCT cannot be applied to a single column partway through a SELECT clause.
* E: This is syntactically incorrect as DISTINCT cannot be used twice in the way shown; it must apply to all columns if used at the beginning of a SELECT statement.

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