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Evaluate the following SQL statement: SQL> select cust_id, cust_last_name “Last name” FROM customers WHERE country_id = 10 UNION SELECT cust_id CUST_NO, cust_last_name FROM customers WHERE country_id = 30 Identify three ORDER BY clauses either one of which can complete the query.
A. ORDER BY “Last name”
B. ORDER BY 2, cust_id
C. ORDER BY CUST_NO
D. ORDER BY 2, 1
E. ORDER BY “CUST_NO”
Correct Answer: ABD
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an
In which normal form is a table, if it has no multi-valued attributes and no partial dependencies?
A. second normal form
B. first normal form
C. third normal form
D. fourth normal form
Correct Answer: A
Evaluate the following query:
Which is the correct output of the above query?
A. 00-300, 54-02, 00 11:12:10.123457
B. 00-300, 00-650, 00 11:12:10.123457
C. 25-00, 54-02, 00 11:12:10.123457
D. 25-00, 00-650, 00 11:12:10.123457
Correct Answer: C
Which three arithmetic operations can be performed on a column by using a SQL function that is built into Oracle database? (Choose three.)
A. Finding the lowest value
B. Finding the quotient
C. Raising to a power
Correct Answer: ACE
View the Exhibit and examine the details of the PRODUCT_INFORMATION table.
You have the requirement to display PRODUCT_NAME and LIST_PRICE from the table where the CATEGORYJD column has values 12 or 13, and the SUPPLIER_ID column has the value 102088. You executed the following SQL
SELECT product_name, list_price
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088;
Which statement is true regarding the execution of the query?
A. It would execute but the output would return no rows.
B. It would execute and the output would display the desired result.
C. It would not execute because the entire WHERE clause condition is not enclosed within the parentheses.
D. It would not execute because the same column has been used in both sides of the AND logical operator to form the condition.
Correct Answer: A
Which two statements are true regarding the SQL GROUP BY clause?
A. You can use a column alias in the GROUP BY clause.
B. Using the WHERE clause after the GROUP BY clause excludes rows after creating groups.
C. The GROUP BY clause is mandatory if you are using an aggregating function in the SELECT clause.
D. Using the WHERE clause before the GROUP BY clause excludes rows before creating groups.
E. If the SELECT clause has an aggregating function, then columns without an aggregating function in the SELECT clause should be included in the GROUP BY clause.
Correct Answer: DE
Which statements are true? (Choose all that apply.)
A. The data dictionary is created and maintained by the database administrator.
B. The data dictionary views consists of joins of dictionary base tables and user-defined tables.
C. The usernames of all the users including the database administrators are stored in the data dictionary.
D. The USER_CONS_COLUMNS view should be queried to find the names of the columns to which a constraint applies.
E. Both USER_OBJECTS and CAT views provide the same information about all the objects that are owned by the user.
F. Views with the same name but different prefixes, such as DBA, ALL and USER, use the same base tables from the data dictionary.
Correct Answer: CDF
The BOOKS_TRANSACTIONS table exists in your schema in this database. You execute this SQL statement when connected to your schema in your database instance.
SQL> SELECT * FROM books_transactions ORDER BY 3;
What is the result?
A. The execution fails unless the numeral 3 in the ORDER BY clause is replaced by a column name.
B. All table rows are displayed sorted in ascending order of the values in the third column.
C. The first three rows in the table are displayed in the order that they are stored.
D. Only the three rows with the lowest values in the key column are displayed in the order that they are stored.
Correct Answer: B
View the Exhibit and examine the data in the employees table.
You want to generate a report showing the total compensation paid to each employee to date. You issue the following query:
What is the outcome?
A. It executes successfully but does not give the correct output.
B. It generates an error because the concatenation operator can be used to combine only two items.
C. It generates an error because the usage of the round function in the expression is not valid
D. It generates an error because the alias is not valid.
E. It executes successfully and gives the correct output.
Correct Answer: A
Examine the structure of the MEMBERS table: (Choose the best answer.)
Examine the SQL statement:
SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC;
What would be the result execution?
A. It displays all cities in descending order, within which the last names are further sorted in descending order.
B. It fails because a column alias cannot be used in the ORDER BY clause.
C. It fails because a column number and a column alias cannot be used together in the ORDER BY clause.
D. It displays all cities in ascending order, within which the last names are further sorted in descending order.
Correct Answer: D
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