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Oracle Database SQL Sample Questions (Q62-Q67):

NEW QUESTION # 62
Examine this statement:

Which two statements are true?

A. The names of employees maximum salary will appear fist to ascending order
B. All remaining employee names will appear in an ascending order
C. All remaining employee names will appear in descending order
D. All remaining employee names will appear in ascending order
E. The names of employees maximum salary will appear fist to descending order
F. The names of employees remaining the maximum salary will appear first in an ascending order

Answer: D,E

NEW QUESTION # 63
Which three statements are true about a self join?

A. It can be an outer join.
B. It must be an equijoin.
C. The on clause must be used.
D. The on clause can be used.
E. It must be an inner join.
F. The query must use two different aliases for the table.

Answer: A,D,F

Explanation:
C . True, when performing a self join, aliases are used to differentiate the same table in different contexts within the same query. This helps in comparing different rows within the same table as if they were in two separate tables.
D . True, the ON clause can be used in self joins to specify the conditions on which the join is based. This is a standard method for specifying join conditions in SQL.
F . True, a self join can be an outer join, allowing for the inclusion of rows that do not have a matching row in the same table according to the join condition. This enhances the flexibility of data analysis and reporting.
Reference:
Oracle documentation on joins: Oracle Database SQL Language Reference
Details on self joins and outer joins: Oracle Joins Tutorial

NEW QUESTION # 64
Which statement is true regarding the default behavior of the ORDER BYclause?

A. Only those columns that are specified in the SELECTlist can be used in the ORDER BYclause.
B. NULL values are not considered at all by the sort operation.
C. In a character sort, the values are case-sensitive.
D. Numeric values are displayed from the maximum to the minimum value if they have decimal positions.

Answer: C

NEW QUESTION # 65
View the Exhibit and examine the description for the PRODUCTS and SALES table.

PROD_IDis a primary key in the PRODUCTStable and foreign key in the SALEStable with ON DELETE CASCADEoption. The SALEStable contains data for the last three years. You want to remove all the rows from the PRODUCTStable for which no sale was done for the last three years.
Which is the valid DELETEstatement?

A. DELETE
FROM products
WHERE prod_id = (SELECT prod_id
FROM sales
WHERE time_id - 3*365 = SYSDATE );
B. DELETE
FROM products
WHERE prod_id IN (SELECT prod_id
FROM sales
WHERE time_id >= SYSDATE - 3*365 );
C. DELETE
FROM products
WHERE prod_id = (SELECT prod_id
FROM sales
WHERE SYSDATE >= time_id - 3*365 );
D. DELETE
FROM products
WHERE prod_id IN (SELECT prod_id
FROM sales
WHERE SYSDATE - 3*365 >= time_id);

Answer: D

NEW QUESTION # 66
Which two statements are true regarding the COUNT function? (Choose two.)

A. COUNT(DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULLs in the INV_AMT column.
B. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.
C. COUNT(*) returns the number of rows including duplicate rows and rows containing NULL value in any column.
D. COUNT(cust_id) returns the number of rows including rows with duplicate customer IDs and NULLs in the CUST_ID column.
E. The COUNT function can be used only for CHAR, VARCHAR2, and NUMBER data types.

Answer: A,C

NEW QUESTION # 67
......

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Valid Oracle Database SQL exam, free latest Oracle 1z0-071 exam pdf

Oracle 1z0-071 Reliable Test Forum & 1z0-071 Exam Guide Materials

Oracle Database SQL Sample Questions (Q62-Q67):

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