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Which two partitioned table maintenance operations support asynchronous Global Index Maintenance in Oracle database 12c?
A. ALTER TABLE SPLIT PARTITION
B. ALTER TABLE MERGE PARTITION
C. ALTER TABLE TRUNCATE PARTITION
D. ALTER TABLE ADD PARTITION
E. ALTER TABLE DROP PARTITION
F. ALTER TABLE MOVE PARTITION
Correct Answer: CE
View the Exhibit and examine the structures of the employees and departments tables.
You must update the employees table according to these requirements::
-Update only those employees who work in Boston or Seattle (locations 2900 and 2700).
-Set department_id for these employees to the department id corresponding to London (locationid 2100). -Set the employees\’ salary in iocation_id 2100 to 1.1 times the average salary of their department.
-Set the employees\’ commission In location_id 2100 to 1.5 times the average commission of their department.
You issue this command:
What is the result?
A. It executes successfully but does not produce the desired update.
B. It executes successfully and produces the desired update.
C. It generates an error because multiple columns cannot be specified together in an UPDATE statement.
D. It generates an error because a subquery cannot have a join condition in an update statement.
Correct Answer: A
Which three statements are true reading subquenes?
A. A Main query can have many subqueries.
B. A subquery can have more than one main query.
C. The subquery and main query must retrieve date from the same table.
D. The subquery and main query can retrieve data from different tables.
E. Only one column or expression can be compared between the subquery and main query.
F. Multiple columns or expressions can be compared between the subquery and main query.
Correct Answer: ADF
Which statement is true regarding the default behavior of the ORDER BY clause?
A. In a character sort, the values are case-sensitive.
B. NULL values are not considered at all by the sort operation.
C. Only those columns that are specified in the SELECT list can be used in the ORDER BY clause.
D. Numeric values are displayed from the maximum to the minimum value if they have decimal positions.
Correct Answer: A
You issue this command which succeeds:
SQL> DROP TABLE products;
Which three statements are true?
A. All existing views and synonyms that refer to the table are invalidated but retained.
B. Any uncommitted transaction in the session is committed.
C. Table data and the table structure are deleted.
D. All the table\’s indexes if any exist, are invalidated but retained.
E. Table data is deleted but the table structure is retained.
Correct Answer: BCD
Which two statements are true regarding the COUNT function?
A. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.
B. COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULL values in the INV_AMT column.
C. COUNT (cust_id) returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_ID column.
D. COUNT (*) returns the number of rows including duplicate rows and rows containing NULL value in any of the columns.
E. The COUNT function can be used only for CHAR, VARCHAR2, and NUMBER data types.
Correct Answer: BD
Examine the structure of the ORDERS table: (Choose the best answer.)
You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,\’rr\’), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, \’yyyy\’);
Which statement is true regarding the result?
A. It executes successfully but does not give the correct output.
B. It executes successfully but gives the correct output.
C. It returns an error because the TO_CHAR function is not valid.
D. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
Correct Answer: D
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
The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues the following GRANT command:
ON orders, order_items
What correction needs to be done to the above statement?
A. PUBLIC should be replaced with specific usernames.
B. ALL should be replaced with a list of specific privileges.
C. WITH GRANT OPTION should be added to the statement.
D. Separate GRANT statements are required for ORDERS and ORDER_ITEMS tables.
Correct Answer: D
View the Exhibit and examine the structure of the ORDER_ITEMS table. (Choose the best answer.)
You must select the ORDER_ID of the order that has the highest total value among all the orders in the ORDER_ITEMS table. Which query would produce the desired result?
A. SELECT order_idFROM order_itemsGROUP BY order_idHAVING SUM(unit_price*quantity) = (SELECT MAX (SUM(unit_price*quantity))FROM order_items GROUP BY order_id);
B. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) = (SELECT MAX (SUM(unit_price*quantity)FROM order_items) GROUP BY order_id);
C. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) = MAX(unit_price*quantity)GROUP BY order_id);
D. SELECT order_idFROM order_itemsWHERE (unit_price*quantity) = (SELECT MAX(unit_price*quantity)FROM order_itemsGROUP BY order_id)
Correct Answer: A
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