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Oracle Database SQL Sample Questions (Q235-Q240):

NEW QUESTION # 235
Examine this statement:
SELECT last name
FROM employees
ORDER BY CASE WHEN salary = (SELECT MAX(salary) FROM employees)
THEN 'A'
ELSE last_ name
END ,last_name DESC;
Which two statements are true?

A. All remaining employee names will appear in an unspecified order.
B. The names of employees earning the maximum salary will appear first in descending order.
C. The names of employees earning the maximum salary will appear first In ascending order.
D. All remaining employee names will appear in ascending order.
E. All remaining employee names will appear in descending order.
F. The names of employees earning the maximum salary will appear first in an unspecified order.

Answer: E,F

NEW QUESTION # 236
Evaluate the following statement.

Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?

A. They are evaluated by all the three WHENclauses regardless of the results of the evaluation of any other WHENclause.
B. They are evaluated by the first WHENclause. If the condition is true, then the row would be evaluated by the subsequent WHENclauses.
C. They are evaluated by the first WHENclause. If the condition is false, then the row would be evaluated by the subsequent WHENclauses.
D. The insert statement would give an error because the ELSEclause is not present for support in case none of WHENclauses are true.

Answer: A

Explanation:
Explanation/Reference:
References:
http://psoug.org/definition/WHEN.htm

NEW QUESTION # 237
Which three are true about privileges and roles? (Choose three.)

A. All roles are owned by the SYS schema.
B. A user has all object privileges for every object in their schema by default.
C. System privileges always set privileges for an entire database.
D. A role is owned by the user who created it.
E. PUBLIC acts as a default role granted to every user in a database.
F. PUBLICcan be revoked from a user.
G. A role can contain a combination of several privileges and roles.

Answer: B,E,G

Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/network.102/b14266/authoriz.htm#i1010570

NEW QUESTION # 238
Which three statements are true regarding the data types?

A. The value for a CHAR data type column is blank-padded to the maximum defined column width.
B. The BLOB data type column is used to store binary data in an operating system file.
C. ATIMESTAMP data type column stores only time values with fractional seconds.
D. The minimum column width that can be specified for a varchar2 data type column is one.
E. Only one LONG column can be used per table.

Answer: A,D,E

NEW QUESTION # 239
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_categoryIl 'has'||promol_cost as COSTS FROM promotions ORDER BY 1:
B. SELECT DISTINCT promo_cost ||'in'IIDISTINCT promo_category promotions ORDER BY1:
C. SELECT promo_category, DISTINCT promo_cost FROM promotiong ORDER BY 2:
D. SELECT promo_cost, promo_category FROM promotions ORDER BY 1
E. SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;

Answer: A,E

Explanation:
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.

NEW QUESTION # 240
......

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Julian Lewis Julian Lewis

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