HIGH PASS RATE 1Z0-071 STUDY TOOL HELPS YOU PASS THE ORACLE DATABASE SQL EXAM

High Pass Rate 1z0-071 Study Tool Helps You Pass the Oracle Database SQL Exam

High Pass Rate 1z0-071 Study Tool Helps You Pass the Oracle Database SQL Exam

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Oracle Database SQL Sample Questions (Q41-Q46):

NEW QUESTION # 41
Examine the ORDER _ITEms table:

Which two queries return rows where QUANTITY is a multiple of ten?

  • A. SELECT FROM order_ items WHERE quantity / 10 = TRUNC (quantity);
  • B. SELECT * FROM order_ items WHERE quantity = TRUNC (quantity, -1);
  • C. SELECT * FROM order_ items WHERE MOD (quantity, 10) = 0;
  • D. SELECT" FROM order_ _items WHERE quantity = ROUND (quantity, 1);
  • E. SELECT" FROM order_ items WHERE FLOOR (quantity / 10) = TRUNC (quantity / 10);

Answer: C,E

Explanation:
* A: This statement will not work because TRUNC(quantity, -1) will truncate the quantity to zero decimal places when the number is a negative power of ten, which does not guarantee that the quantity is a multiple of ten.
* B: This statement is correct. The MOD function returns the remainder of a division. If MOD(quantity,
10) equals zero, it means that quantity is a multiple of ten.
* C: This statement is correct. FLOOR(quantity / 10) equals TRUNC(quantity / 10) when quantity is an exact multiple of ten, as FLOOR returns the largest integer less than or equal to a number, and TRUNC will truncate the decimal part.
* D: This statement is incorrect because TRUNC(quantity) would remove any decimal places from quantity, and comparing it to quantity / 10 will not guarantee that the quantity is a multiple of ten.
* E: This statement is incorrect. ROUND(quantity, 1) will round the quantity to one decimal place, not check if it's a multiple of ten.


NEW QUESTION # 42
View the exhibit and examine the structure of the CUSTOMERStable.

Which two tasks would require subqueries or joins to be executed in a single statement?

  • A. finding the number of customers, in each city, whose credit limit is more than the average credit limit of all the customers
  • B. listing of those customers, whose credit limit is the same as the credit limit of customers residing in the city 'Tokyo'.
  • C. finding the average credit limit of male customers residing in 'Tokyo'or 'Sydney'
  • D. finding the number of customers, in each city, whose marital status is 'married'.
  • E. listing of customers who do not have a credit limit and were born before 1980

Answer: A,B


NEW QUESTION # 43
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

You wrote this SQL statement to retrieve EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, for all employees:
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 DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
  • B. The table prefix is missing for the column names in the SELECT clause.
  • C. The NATURAL JOIN clause is missing the USING clause.
  • D. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.

Answer: D

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 # 44
Which two statements are true about the rules of precedence for operators?

  • A. The + binary operator has the highest precedence in an expression in a SQL statements.
  • B. Multiple parentheses can be used to override the default precedence of operators in an expression.
  • C. Arithmetic operators with equal precedence are evaluated from left to right within an expression.
  • D. The concatenation operator || is always evaluated before addition and subtraction in an expression.
  • E. NULLS influence the precedence of operators in an expression.

Answer: B,C


NEW QUESTION # 45
Which normal form is a table in if it has no multi-valued attributes and no partial dependencies?

  • A. first normal form
  • B. second normal form
  • C. fourth normal form
  • D. third normal form

Answer: B

Explanation:
Explanation/Reference:
References:
https://blog.udemy.com/database-normal-forms/


NEW QUESTION # 46
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