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Oracle Database SQL Sample Questions (Q227-Q232):

NEW QUESTION # 227
Which is the default column or columns for sorting output from compound queries using SET operators such as INTERSECT in a SQL statement?

A. The first VARCHAR2 column in the first SELECT of the compound query
B. The first NUMBER column in the first SELECT of the compound query
C. The first column in the first SELECT of the compound query
D. The first column in the last SELECT of the compound query
E. The first NUMBER or VARCHAR2 column in the last SELECTof the compound query

Answer: C

NEW QUESTION # 228
Which two partitioned table maintenance operations support asynchronous Global Index Maintenance in Oracle database 12c?

A. ALTER TABLE MOVE PARTITION
B. ALTER TABLE SPLIT PARTITION
C. ALTER TABLE TRUNCATE PARTITION
D. ALTER TABLE DROP PARTITION
E. ALTER TABLE MERGE PARTITION
F. ALTER TABLE ADD PARTITION

Answer: C,D

NEW QUESTION # 229
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

The retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?

A. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
B. The table prefix is missing for the column names in the SELECT clause.
C. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
D. The NATURAL JOIN clause is missing the USING clause.

Answer: A

Explanation:
Explanation
Natural join needs only one column to be the same in each table. The EMPLOYEES and DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)

NEW QUESTION # 230
Which two statements are true about conditional INSERT ALL?

A. Each row returned by the subquery can be inserted into only a single target table.
B. Each WHEN condition is tested for each row returned by the subquery.
C. A single WHEN condition can be used for multiple INTO clauses.
D. It cannot have an ELSE clause.
E. The total number of rows inserted is always equal to the number of rows returned by the subquery

Answer: B,C

NEW QUESTION # 231
Examine the description of the CUSTOMERS table:

You want to display details of all customers who reside in cities starting with the letter D followed by at least two characters.
Which query can be used?

A. SELECT * FROM customers WHERE city LIKE 'D_';
B. SELECT * FROM customers WHERE city LIKE 'D_%';
C. SELECT * FROM customers WHERE city = '%D_';
D. SELECT * FROM customers WHERE city = 'D_%';

Answer: B

NEW QUESTION # 232
......

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