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NEW QUESTION 172
Examine this SELECT statement and view the Exhibit to see its output:
SELECT constraints_name, constraints_type, search_condition, r_constraint_name, delete_rule, status,
FROM user_constraints
WHERE table_name = 'ORDERS';
Which two statements are true about the output? (Choose two.)
- A. The STATUS column indicates whether the table is currently in use.
- B. In the second column, 'c' indicates a check constraint.
- C. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.
- D. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
Answer: B,C
NEW QUESTION 173
You issue this command which succeeds:
SQL> DROP TABLE products;
Which three statements are true?
- A. Table data is deleted but the table structure is retained.
- B. All the table's indexes if any exist, are invalidated but retained.
- C. Any uncommitted transaction in the session is committed.
- D. Table data and the table structure are deleted.
- E. All existing views and synonyms that refer to the table are invalidated but retained.
Answer: B,D,E
NEW QUESTION 174
View the exhibit and examine the structure of the CUSTOMERStable.
Which two tasks would require subqueries or joins to be executed in a single statement?
- A. finding the average credit limit of male customers residing in 'Tokyo'or 'Sydney'
- B. listing of customers who do not have a credit limit and were born before 1980
- C. finding the number of customers, in each city, whose credit limit is more than the average credit limit of all the customers
- D. finding the number of customers, in each city, who's marital status is 'married'.
- E. listing of those customers, whose credit limit is the same as the credit limit of customers residing in the city 'Tokyo'.
Answer: C,E
NEW QUESTION 175
Examine this list of queries:
1. SELECT ROUND (TRUNC (15, 193, 1)) ''Results'' FROM DUAL;
2. SELECT ROUND (15, 193, 1)) ''Results'' FROM DUAL;
3. SELECT (TRUNC (15, 193, 1)) ''Results'' FROM DUAL;
4. SELECT ROUND (ROUND (15. 193, 1)) ''Results'' FROM DUAL;
Which two statements are true?
- A. 1 and 4 give the same result.
- B. 2 returns the value 20.
- C. 3 returns an error.
- D. 1 and 4 give different results.
- E. 2 and 3 give the same result.
Answer: B,D
NEW QUESTION 176
Which two statements are true about the ORDER BY clause when used with a SQL statement containing a SET operator such as UNION?
- A. The first column in the first SELECT of the compound query with the UNION operator is used by default to sort output in the absence of an ORDER BY clause.
- B. Each SELECT statement in the compound query must have its own ORDER BY clause.
- C. Each SELECT statement in the compound query can have its own ORDER BY clause.
- D. Only column names from the first SELECT statement in the compound query are recognized.
- E. Column positions must be used in the ORDER BY clause.
Answer: A,D
NEW QUESTION 177
Which statement is true regarding the INTERSECT operator?
- A. Reversing the order of the intersected tables the result
- B. The number of columns and data types must be identical for all SELECT statements in the query
- C. The names of columns in all SELECT statements must be identical
- D. It ignores NULL values
Answer: B
Explanation:
INTERSECT Returns only the rows that occur in both queries' result sets, sorting them and
removing duplicates.
The columns in the queries that make up a compound query can have different names, but
the output result set will use the names of the columns in the first query.
NEW QUESTION 178
View the Exhibit and examine the description for the SALES and CHANNELS tables.
You issued this SQL statement:
Which statement is true regarding the result? (Choose the best answer.)
- A. The statement will execute and a new row will be inserted in the SALES table.
- B. The statement will fail because the VALUES clause is not required with the subquery.
- C. The statement will fail because the subquery in the VALUES clause is not enclosed within single quotation marks.
- D. The statement will fail because a subquery cannot be used in a VALUES clause.
Answer: A
NEW QUESTION 179
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. truncate leavers any indexes on the table in an UNUSABLE STATE.
- C. the result of a delete can be undone by issuing a rollback
- D. TRUNCATE can use a where clause to determine which row(s) should be removed.
- E. the result of a truncate can be undone by issuing a ROLLBACK.
Answer: A,C
NEW QUESTION 180
You execute this command:
TRUNCATE TABLE depts;
Which two are true?
- A. A ROLLBACK statement can be used to retrieve the deleted data.
- B. It retains the integrity constraints defined on the table.
- C. It always retains the space used by the removed rows
- D. It drops any triggers defined on the table.
- E. It retains the indexes defined on the table.
- F. A Flashback TABLE statement can be used to retrieve the deleted data.
Answer: B,E
NEW QUESTION 181
View the Exhibit and examine the details of the ORDER_ITEMS table.
Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)
- A. Statement 1 would return only one row of output.
- B. Statement 2 would return multiple rows of output.
- C. Both the statements would give the same output.
- D. Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.
- E. Statement 1 would not return give the same output.
Answer: A,B,D
NEW QUESTION 182
View the Exhibit and examine the structure of the ORDERStable.
Which UPDATE statement is valid?
- A. UPDATE orders
SET order_date = '12-mar-2007',
AND order_total = TO_NUMBER(NULL)
WHERE order_id = 2455; - B. UPDATE orders
SET order_date = TO_DATE('12-mar-2007','dd-mon-yyyy'),
SET order_total = TO_NUMBER (NULL)
WHERE order_id = 2455; - C. UPDATE orders
SET order_date = '12-mar-2007',
order_total = NULL
WHERE order_id = 2455; - D. UPDATE orders
SET order_date = '12-mar-2007',
order_total IS NULL
WHERE order_id = 2455;
Answer: C
NEW QUESTION 183
View the Exhibit and examine the structure of ORDERSand ORDER_ITEMStables.
ORDER_IDis the primary key in the ORDERStable. It is also the foreign key in the ORDER_ITEMStable wherein it is created with the ON DELETE CASCADEoption.
Which DELETEstatement would execute successfully?
- A. DELETE
FROM orders
WHERE (SELECT order_id
FROM order_items); - B. DELETE orders
WHERE order_total < 1000; - C. DELETE order_id
FROM orders
WHERE order_total < 1000; - D. DELETE orders o, order_items i
WHERE o.order_id = i.order_id;
Answer: B
NEW QUESTION 184
Examine the description of the EMP_DETAILS table given below:
Which two statements are true regarding SQL statements that can be executed on the EMP_DETAIL TABLE?
- A. An EMP_IMAGE column can be included in the GROUP BY clause.
- B. You can alter the table to include the NOT NULL constraint on the EMP_IMAGE column.
- C. You cannot add a new column to the table with LONG as the data type.
- D. An EMP_IMAGE column cannot be included in the ORDER BY clause.
Answer: C,D
Explanation:
Explanation
NEW QUESTION 185
Which three statements are true about GLOBAL TEMPORARY TABLES?
- A. GLOBAL TEMPORARY TABLE space allocation occurs at session start.
- B. Any GLOBAL TEMPORARY TABLE rows existing at session termination will be deleted.
- C. GLOBAL TEMPORARY TABLE rows inserted by a session are available to any other session whose user has been granted select on the table.
- D. A GLOBAL TEMPORARY TABLE's definition is available to multiple sessions.
- E. A TRUNCATE command issued in a session causes all rows in a GLOBAL TEMPORARY TABLE for the issuing session to be deleted.
- F. A DELETE command on a GLOBAL TEMPORARY TABLE cannot be rolled back.
Answer: B,D,E
NEW QUESTION 186
Which two statements are true regarding constraints? (Choose two.)
- A. All the constraints can be defined at the column level as well as the table level
- B. A foreign key cannot 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. A column with the UNIQUE constraint can contain NULL.
Answer: D,E
NEW QUESTION 187
View the exhibit and examine the description of SALES and PROMOTIONS tables.
You want to delete rows from the SALES table, where the PROMO_NAME column in the PROMOTIONS table has either blowout sale or everyday low price as values.
Which three DELETE statements are valid? (Choose three.)
- A. DELETEFROM salesWHERE promo_id IN (SELECT promo_idFROM promotionsWHERE promo_name IN = 'blowout sale','everyday low price'));
- B. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promo_name = 'blowout sale')AND promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')FROM promotionsWHERE promo_name = 'everyday low price');
- C. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')
- D. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_name = 'everyday low price');
Answer: A,C,D
NEW QUESTION 188
Examine the structure of the PROGRAMS table:
Which two SQL statements would execute successfully?
- A. SELECT NVL (ADD_MONTHS (END_DATE,1) SYSDATE) FROM programs;
- B. SELECT NVL (TO_CHAR (MONTHS_BETWEEN (start-date, end_date)), 'Ongoing') FROM programs
- C. SELECT TO_DATE (NVL (SYSDATE-END_DATE, SYSDATE)) FROM programs;
- D. SELECT NVL (MONTHS_BETWEEN (start_date, end_date), 'Ongoing') FROM programs;
Answer: A,B
NEW QUESTION 189
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