STUDY 1Z0-071 TOOL & VALID TEST 1Z0-071 TUTORIAL

Study 1z0-071 Tool & Valid Test 1z0-071 Tutorial

Study 1z0-071 Tool & Valid Test 1z0-071 Tutorial

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Oracle Database SQL Sample Questions (Q136-Q141):

NEW QUESTION # 136
Examine the description of the EMP_DETAILS table given below:

Which two statements are true regarding SQL statements that can be executed on the EMP_DETAIL TABLE?

  • A. You can alter the table to include the NOT NULL constraint on the EMP_IMAGE column.
  • B. An EMP_IMAGE column can be included in the GROUP BY clause.
  • C. An EMP_IMAGE column cannot be included in the ORDER BY clause.
  • D. You cannot add a new column to the table with LONG as the data type.

Answer: C,D


NEW QUESTION # 137
Evaluate the following two queries:

Which statement is true regarding the above two queries?

  • A. There would be no change in performance.
  • B. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
  • C. Performance would improve in query 2.
  • D. Performance would degrade in query 2.

Answer: A


NEW QUESTION # 138
Examine the data in the PRODUCTS table:

Examine these queries:
1. SELECT prod name, prod list
FROM products
WHERE prod 1ist NOT IN(10,20) AND category _id=1;
2. SELECT prod name, | prod _ list
FROM products
WHERE prod list < > ANY (10,20) AND category _id= 1;
SELECT prod name, prod _ list
FROM products
WHERE prod_ list <> ALL (10, 20) AND category _ id= 1;
Which queries generate the same output?

  • A. 1 and 2
  • B. 2 and 3
  • C. 1, 2 and 3
  • D. 1 and 3

Answer: D

Explanation:
Based on the given PRODUCTS table and the SQL queries provided:
Query 1: Excludes rows where prod_list is 10 or 20 and category_id is 1.
Query 2: Includes rows where prod_list is neither 10 nor 20 and category_id is 1.
Query 3: Excludes rows where prod_list is both 10 and 20 (which is not possible for a single value) and category_id is 1.
The correct answer is A, queries 1 and 3 will produce the same result. Both queries exclude rows where prod_list is 10 or 20 and include only rows from category_id 1. The NOT IN operator excludes the values within the list, and <> ALL operator ensures that prod_list is not equal to any of the values in the list, which effectively excludes the same set of rows.
Query 2, using the <> ANY operator, is incorrect because this operator will return true if prod_list is different from any of the values in the list, which is not the logic represented by the other two queries.


NEW QUESTION # 139
Examine the description of the EMPLOYERS table:

Examine these requirements:
Disable the manager ID and salary of the lowest paid employees for that manager.
Exclude anyone whose manager is not known.
Exclude any managers where the minimum salary is 6000 or less.
Sort the output by minimum salary with the highest salary shown first.
Which statement will do this?

  • A. SELECT manager_id, HTN(salary)
    FROM employees
    WHERE manager_id IS NOT NULL
    HAVING MIN (salary) > 6000
    GROUP BY manager_id
    ORDEU BY MIN (salary) DESC;
  • B. SELECT manager_id, MTN(salary)
    FROM employees
    WHERE manager_ id IS NOT NULL
    GROUP BY manager_id
    HAVING MlN (salary) > 6000
    ORDER BV MlN (salary);
  • C. SELECT manager_id, MIN(salary)
    FROM employees
    WHERE manager_id IS NOT NULL
    AND MIN(salary) > 6000
    GROUP BY manager_id
    ORDER BY MlN (salary) DESC;
  • D. SELECT managar_id, MIN (salary)
    FROM employees
    HAVING MIN(salary) > 6000
    WHERE manager_id IS NOT NULL
    GROUP BY manager_id
    ORDER BY MTN(salary) DESC;

Answer: B


NEW QUESTION # 140
Examine the command:

What does ON DELETE CASCADE imply?

  • A. When the BOOKS table is dropped, the BOOK_TRANSACTIONS table is dropped.
  • B. When a value in the BOOKS.BOOK_ID column is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_ID column.
  • C. When a row in the BOOKS table is deleted, the rows in the BOOK_TRANSACTIONS table whose BOOK_ID matches that of the deleted row in the BOOKS table are also deleted.
  • D. When the BOOKS table is dropped, all the rows in the BOOK_TRANSACTIONS table are deleted but the table structure is retained.

Answer: C


NEW QUESTION # 141
......

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