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Q11. View the Exhibit and examine the structure of the CUSTOMERS table. 

You have been asked to produce a report on the customers table showing the customers details sorted in descending order of the city and in the descending order of their income level in each city. 

Which query would accomplish this task? 

A. Option A 

B. Option B 

C. Option C D. Option D 


Q12. Which two statements are true regarding constraints? 

A. A foreign key cannot contain null values. 

B. A column with the unique constraint can contain null values. 

C. A constraint is enforced only for the insert operation on a table. 

D. A constraint can be disabled even if the constraint column contains data. 

E. All constraints can be defined at the column level as well as the table level. 

Answer: B,D 

Q13. View the Exhibits and examine products and sales tables. 

You issue the following query to display product name and the number of times the product has been sold: 

What happens when the above statement is executed? 

A. The statement executes successfully and produces the required output. 

B. The statement produces an error because item_cnt cannot be displayed in the outer query. 

C. The statement produces an error because a subquery in the from clause and outer-joins cannot be used together. 

D. The statement produces an error because the group by clause cannot be used in a subquery in the from clause. 


Q14. Examine the structure of the transactions table: 

You want to display the date, time, and transaction amount of transactions that where done before 12 noon. The value zero should be displayed for transactions where the transaction amount has not been entered. 

Which query gives the required result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 


Q15. You want to display 5 percent of the employees with the highest salaries in the EMPLOYEES table. 

Which query will generate the required result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 


Updated 1Z0-061 test engine:

Q16. Which two statements are true regarding subqueries? 

A. A subquery can retrieve zero or more rows. 

B. Only two subqueries can be placed at one level. 

C. A subquery can be used only in SQL query statements. 

D. A subquery can appear on either side of a comparison operator. 

E. There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement. 

Answer: A,D 


Using a Subquery to Solve a Problem Suppose you want to write a query to find out who earns a salary greater than Abel’s salary. To solve this problem, you need two queries: one to find how much Abel earns, and a second query to find who earns more than that amount. You can solve this problem by combining the two queries, placing one query inside the other query. The inner query (or subquery) returns a value that is used by the outer query (or main query). Using a subquery is equivalent to performing two sequential queries and using the result of the first query as the search value in the second query. Subquery Syntax A subquery is a SELECT statement that is embedded in the clause of another SELECT statement. You can build powerful statements out of simple ones by using subqueries. They can be very useful when you need to select rows from a table with a condition that depends on the data in the table itself. You can place the subquery in a number of SQL clauses, including the following: WHERE clause HAVING clause FROM clause In the syntax: operator includes a comparison condition such as >, =, or IN Note: Comparison conditions fall into two classes: single-row operators (>, =, >=, <, <>, <=) and multiple-row operators (IN, ANY, ALL, EXISTS). The subquery is often referred to as a nested SELECT, sub-SELECT, or inner SELECT statement. The subquery generally executes first, and its output is used to complete the query condition for the main (or outer) query. Guidelines for Using Subqueries Enclose subqueries in parentheses. Place subqueries on the right side of the comparison condition for readability. (However, the subquery can appear on either side of the comparison operator.) Use single-row operators with single-row subqueries and multiple-row operators with multiple-row subqueries. 

Subqueries can be nested to an unlimited depth in a FROM clause but to “only” 255 levels in a WHERE clause. They can be used in the SELECT list and in the FROM, WHERE, and HAVING clauses of a query. 

Q17. Which three SQL statements would display the value 1890.55 as $1, 890.55? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 

Answer: A,D,E 

Q18. In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'. 

Evaluate the following query: 

What would be the outcome? 

A. Abigail PA 

B. Abigail Pa 

C. Abigail IS 

D. An error message 


Q19. Examine the structure of the orders table: 

You want to find the total value of all the orders for each year and issue the following command: 

Which statement is true regarding the outcome? 

A. It executes successfully and gives the correct output. 

B. It gives an error because the TO_CHAR function is not valid. 

C. It executes successfully but does not give the correct output. 

D. It gives an error because the data type conversion in the SELECT list does not match the data type conversion in the GROUP BY clause. 


Q20. View the Exhibit and examine the data in the PROMO_NAME and PROMO_END_DATE columns of the promotions table, and the required output format. 

Which two queries give the correct result? A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: C,D