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2026 1z0-071 Real Exam Questions | High Pass-Rate 100% Free Preparation Oracle Database SQL Store

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Oracle Database SQL Sample Questions (Q17-Q22):

NEW QUESTION # 17
Which three are true about the CREATE TABLE command?

Answer: C,D,F


NEW QUESTION # 18
Examine the command to create the BOOKS table.

The BOOK_ID value 101 does not exist in the table.
Examine the SQL statement:

Which statement is true?

Answer: C


NEW QUESTION # 19
Examine the business rule:
Each student can work on multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario?

Answer: B,D

Explanation:
Explanation
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html


NEW QUESTION # 20
View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables.

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?

Answer: C

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


NEW QUESTION # 21
which three statements are true regarding single row subqueries?

Answer: B,C,D

Explanation:
Regarding single-row subqueries:
* A. THEY CAN BE USED in the where clause: Single-row subqueries can be used in the WHERE clause to compare a column's value against the result of the subquery.
* B. A SQL STATEMENT MAY HAVE MULTIPLE SINGLE ROW SUBQUERY BLOCKS: It is possible to use more than one single-row subquery within a SQL statement, each potentially in different parts of the statement (e.g., SELECT clause, WHERE clause).
* E. THEY CAN BE USED IN THE HAVING CLAUSE: Similar to the WHERE clause, single-row subqueries can also be used in the HAVING clause to filter groups based on a condition evaluated against a subquery result.
Incorrect options are:
* C and D: There is no such limitation on the placement of single-row subqueries relative to the comparison operator; they can be used on either side.
* F: Single-row subqueries must return exactly one row to avoid errors, but they do not necessarily have to return a row; if no row is returned, the query may still execute, potentially returning no rows in the outer query.


NEW QUESTION # 22
......

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