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NEW QUESTION # 129
The SQL statements executed in a user session are as follows:
Which two statements describe the consequences of issuing the ROLLBACK TO SAVE POINT acommand in the session? (Choose two.)
- A. Both the DELETEstatements and the UPDATEstatement are rolled back.
- B. The rollback generates an error.
- C. No SQL statements are rolled back.
- D. Only the DELETEstatements are rolled back.
- E. Only the second DELETEstatement is rolled back.
Answer: B,C
NEW QUESTION # 130
Which two statements are true regarding operators used with subqueries (Choose two.)
- A. The NOToperator can be used with IN, ANYand ALLoperators.
- B. The INoperator cannot be used in single-row subqueries.
- C. =ANYand =ALLoperators have the same functionality.
- D. The <ANYoperator means less than the maximum.
- E. The NOT INoperator is equivalent to IS NULL.
Answer: A,D
NEW QUESTION # 131
Which three are true about multiple INSERT statements?
- A. They can be performed only by using a subquery.
- B. They can be performed on relational tables.
- C. They can insert each computed row into more than one table.
- D. They can be performed on remote tables.
- E. They can be performed on views.
- F. They can be performed on external tables using SQL*Loader.
Answer: A,B,D
NEW QUESTION # 132
Examine the commands used to create DEPARTMENT_DETAILS and COURSE_DETAILS:
You want to generate a report that shows all course IDs irrespective of whether they have corresponding department IDs or not but no department IDs if they do not have any courses.
Which SQL statement must you use?
- A. SELECT c.course_id, d.department_id FROM course_details c RIGHT OUTER JOIN department_details d ON (c.depatrment_id=d.department_id)
- B. SELECT course_id, department_id, FROM department_details d RIGHT OUTER JOIN course_details c USING (department_id)
- C. SELECT c.course_id, d.department_id FROM course_details c FULL OUTER JOIN department_details d ON (c.department_id=d. department_id)
- D. SELECT c.course_id, d.department_id FROM course_details c FULL OUTER JOIN department_details d ON (c.department_id<>d. department_id)
Answer: C
NEW QUESTION # 133
View the exhibit and examine the structures of the EMPLOYEES and DEPARTMENTS tables.
You want to update EMPLOYEES table as follows:
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 (location_id 2100).
Set the employees' salary in location_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 the following command:
What is outcome?
- A. It executes successfully and gives the desired update.
- B. It generates an error because a subquery cannot have a join condition in a UPDATE statement.
- C. It generates an error because multiple columns (SALARY, COMMISSION) cannot be specified together in an UPDATE statement.
- D. It executes successfully but does not give the desired update.
Answer: D
NEW QUESTION # 134
The following are the steps for a correlated subquery, listed in random order:
1. The WHEREclause of the outer query is evaluated.
2. The candidate row is fetched from the table specified in the outer query.
3. The procedure is repeated for the subsequent rows of the table, till all the rows are processed.
4. Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Identify the option that contains the steps in the correct sequence in which the Oracle server evaluates a correlated subquery.
- A. 2, 4, 1, 3
- B. 4, 1, 2, 3
- C. 2, 1, 4, 3
- D. 4, 2, 1, 3
Answer: A
Explanation:
Explanation/Reference:
References:
http://rajanimohanty.blogspot.co.uk/2014/01/correlated-subquery.html
NEW QUESTION # 135
View the Exhibit and examine the structure of the PORDUCT_INFORMATION table. (Choose the best answer.)
PRODUCT_ID column is the primary key.
You create an index using this command:
SQL > CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
No other indexes exist on the PRODUCT_INFORMATION table.
Which query would use the UPPER_NAME_IDX index?
- A. SELECT UPPER(product_name)
FROM product_information
WHERE product_id = 2254; - B. SELECT product_id, UPPER(product_name)
FROM product_information
WHERE UPPER(product_name) = 'LASERPRO' OR list_price > 1000; - C. SELECT UPPER(product_name)
FROM product_information; - D. SELECT product_id
FROM product_information
WHERE UPPER(product_name) IN ('LASERPRO', 'CABLE');
Answer: D
NEW QUESTION # 136
View the Exhibit and examine the description of the EMPLOYEES table.
Evaluate the following SQL statement:
SELECT first_name, employee_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1) "Review" FROM employees; The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID, and review date for employees. The review date is the firsts Monday after the completion of six months of the hiring. The NLS_TERRITORY parameter is set to AMERICA in the session.
Which statement is true regarding this query?
- A. The query would execute but the output would give review dates that are Sundays.
- B. The query would not execute because the NEXT_DAY function accepts a string as argument.
- C. The query would execute to give the desired output.
- D. The query would not execute because date functions cannot be nested.
Answer: A
NEW QUESTION # 137
Which statement is true regarding external tables?
- A. ORACLE_LOADER and ORACLE_DATAPUMP have exactly the same functionality when used with an external table.
- B. The data and metadata for an external table are stored outside the database.
- C. The default REJECT LIMIT for external tables is UNLIMITED.
- D. The CREATE TABLE AS SELECT statement can be used to unload data into regular table in the database from an external table.
Answer: D
NEW QUESTION # 138
Examine the description of the PRODUCT_STATUS table:
The STATUS column contains the values 'IN STOCK' or 'OUT OF STOCK' for each row.
Which two queries will execute successfully?
- A. Option C
- B. Option E
- C. Option B
- D. Option D
- E. Option F
- F. Option A
Answer: B,C
NEW QUESTION # 139
Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c?
- A. You can perform basic administrative tasks for pluggable databases by using the EM express interface.
- B. You can use EM express to manage multiple databases running on the same server.
- C. You can create and configure pluggable databases by using EM express.
- D. By default, EM express is available for a database after database creation.
- E. You cannot start up or shut down a database Instance by using EM express.
Answer: D
NEW QUESTION # 140
Examine the description of the BRICKS table;
Examine the description of the BRICKS_STAGE table;
Which two queries execute successfully?
- A. SELECT shape,color FROM bricks
MINUS
SELECT color,shape FROM bricks_stage; - B. SELECT shape,color,weight from bricks
MINUS
SELECT * FROM bricks_stage; - C. select * from bricks
MINUS
select * from bricks_stage; - D. SELECT brick_id,shape FROM bricks
MINUS
SELECT WEIGHT,COLOR from bricks_stage; - E. SELECT shape,color FROM bricks
MINUS
SELECT WEIGHT,color FROM bricks_stage;
Answer: C
Explanation:
In Oracle SQL, when using the set operators like MINUS, the number of columns and their data types in the SELECT statements must match in sequence.
A). This query will not execute successfully because the SELECT * FROM bricks_stage will return all columns from the BRICKS_STAGE table, which are WEIGHT, SHAPE, and COLOR, but the first SELECT statement specifies only SHAPE and COLOR. The order and number of columns must match.
B). This query will not execute successfully. The SELECT statements have a different number of columns, and the data types of the columns in the same positions do not match between the two queries. The first column in the first SELECT is SHAPE (VARCHAR2), and in the second SELECT, it is WEIGHT (NUMBER).
C). This query will execute successfully. The SELECT * from both tables will ensure that the number of columns and their data types are the same, as SELECT * selects all columns from the table. As long as the two tables have the same column order and data types for those columns, the query will execute.
D). This query will not execute successfully. Even though the columns are of the same data types, their order in the SELECT statements must match for the set operator to work. The order of SHAPE and COLOR is switched between the two queries.
E). This query will not execute successfully. The number of columns in the SELECT statements is the same, but their data types do not match between the two queries. BRICK_ID (NUMBER) in the first query does not match WEIGHT (NUMBER) in the second, and SHAPE (VARCHAR2) does not match COLOR (VARCHAR2).
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Combining Queries with Set Operators"
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "MINUS"
NEW QUESTION # 141
View the Exhibit and examine PRODUCTS and ORDER_ITEMS tables.
You executed the following query to display PRODUCT_NAME and the number of times the product has been ordered:
SELECT p.product_name, i.item_cnt
FROM (SELECT product_id, COUNT (*) item_cnt
FROM order_items
GROUP BY product_id) i RIGHT OUTER JOIN products p
ON i.product_id = p.product_id;
What would happen when the above statement is executed?
- A. The statement would execute successfully to produce the required output.
- B. The statement would not execute because the ITEM_CNT alias cannot be displayed in the outer query.
- C. The statement would not execute because inline views and outer joins cannot be used together.
- D. The statement would not execute because the GROUP BY clause cannot be used in the inline.
Answer: A
NEW QUESTION # 142
Examine this description of the PRODUCTS table:
Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode. Which three commands execute successfully on PRODUCTS?
- A. ALTER TABLE products DROP UNUSED COLUMNS
- B. TRUNCATE TABLE products;
- C. CREATE INDEX price_idx on products (price);
- D. ALTER TABLE products SET UNUSED(expiry_date);
- E. DROP TABLE products
- F. ALTER TAELE products DROP COLUMN expiry_date;
Answer: A,C,E
NEW QUESTION # 143
Examine the description of the MEMBERS table;
SELECT city,last_name LNAME FROM members ...
You want to display all cities that contain the string AN. The cities must be returned in ascending order, with the last names further sorted in descending order.
Which two clauses must you add to the query?
- A. WHERE city LIKE '%AN%;
- B. ORDER BY last_name DESC,city ASC
- C. WHERE city='%AN%;
- D. WHERE city IN ('%AN%')
- E. ORDER BY 1,2.
- F. CORADER BY 1, LNAME DESC
Answer: A,F
Explanation:
To achieve the desired output for the query from the MEMBERS table:
* C. ORDER BY 1, LNAME DESC: This clause correctly sorts the results first by the first column (city) in ascending order by default, and then by the alias LNAME (last_name) in descending order.
* E. WHERE city LIKE '%AN%': This clause correctly filters the rows to include only those cities containing the string 'AN' anywhere in the city name, using the LIKE operator which is suitable for pattern matching.
Incorrect options:
* A: This would order both columns in ascending order, which does not meet the requirement for last_name to be in descending order.
* B: This misplaces the order priorities and uses explicit column names that contradict the sorting requirement specified.
* D: Incorrect syntax for a LIKE clause; equality operator cannot be used with wildcards.
* F: The IN operator is incorrectly used here with a pattern, which is not valid syntax.
NEW QUESTION # 144
View the Exhibit and examine the structure of the BOOKS table.
The BOOKS table contains details of 100 books.
Examine the commands executed and their outcome:
Which statement is true?
- A. Both ROLLBACK commands restore the 100 rows that were deleted.
- B. Both ROLLBACK commands restore the 101 rows that were deleted.
- C. The first rollback restores the 101 rows that were deleted and the second rollback causes the row was inserted to be deleted and commits the changes.
- D. The first rollback restores the 100 rows that were deleted and the second rollback commits only the changes.
Answer: C
NEW QUESTION # 145
Examine this query:
SELECT SUBSTR (SYSDATE,1,5) 'Result' FROM DUAL
Which statement is true?
- A. It executes successfully with an implicit data type conversion
- B. It fails unless the expression is modified to SUBSTR (TO_ CHAR(TRUNC(SYSDATE)),1,5)
- C. It fails unless the expression is modified to SUBSTR (TO_ CHAR(SYSDATE),1,5)
- D. It fails unless the expression is modified to TO-CHAR(SUNBSTR(SYSDATE,1,5)
Answer: A
NEW QUESTION # 146
View the Exhibit and examine the structure of the PRODUCT_INFORMATION table.
PRODUCT_ID column is the primary key.
You create an index using this command:
SQL > CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
No other indexes exist on the PRODUCT_INFORMATION table.
Which query would use the UPPER_NAME_IDX index? (Choose the best answer.)
- A. SELECT product_idFROM product_informationWHERE UPPER(product_name) IN ('LASERPRO', 'CABLE');
- B. SELECT UPPER(product_name)FROM product_information;
- C. SELECT product_id, UPPER(product_name)FROM product_informationWHERE UPPER(product_name)='LASERPRO' OR list_price > 1000;
- D. SELECT UPPER(product_name)FROM product_informationWHERE product_id = 2254;
Answer: A
NEW QUESTION # 147
View the Exhibit and examine the structure of the ORDER_ITEMS table.
Examine the following SQL statement:
SELECT order_id, product_id, unit_price
FROM order_items
WHERE unit_price =
(SELECT MAX(unit_price)
FROM order_items
GROUP BY order_id);
You want to display the PRODUCT_ID of the product that has the highest UNIT_PRICE per ORDER_ID.
What correction should be made in the above SQL statement to achieve this?
- A. Remove the GROUP BY clause from the subquery and place it in the main query
- B. Replace = with the >ALL operator
- C. Replace = with the >ANY operator
- D. Replace = with the IN operator
Answer: D
NEW QUESTION # 148
Which two statements are true about truncate and delete?
- A. delete can use a where clause to determine which row(s) should be removed.
- B. the result of a delete can be undone by issuing a rollback
- C. the result of a truncate can be undone by issuing a ROLLBACK.
- D. TRUNCATE can use a where clause to determine which row(s) should be removed.
- E. truncate leavers any indexes on the table in an UNUSABLE STATE.
Answer: A,B
NEW QUESTION # 149
View and Exhibit and examine the structure and data in the INVOICEtable.
Which two statements are true regarding data type conversion in query expressions? (Choose two.)
- A. inv_no BETWEEN '101' AND '110': uses implicit conversion
- B. inv_date > '01-02-2008': uses implicit conversion
- C. inv_date = '15-february-2008':uses implicit conversion
- D. inv_amt = '0255982': requires explicit conversion
- E. CONCAT(inv_amt, inv_date): requires explicit conversion
Answer: A,C
NEW QUESTION # 150
Which two are true about dropping columns from a table?
- A. A column that is referenced by another column in any other table cannot be dropped.
- B. A primary key column cannot be dropped.
- C. A column drop is implicitly committed.
- D. Multiple columns can be dropped simultaneously using the ALTER TABLE command.
- E. A column must be set as unused before it is dropped from a table.
- F. A column can be removed only if it contains no data.
Answer: A,C,D
NEW QUESTION # 151
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