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单选题 Which statement is true regarding Flashback Version Query? ()

A

 It returns versions of rows only within a transaction.

B

 It can be used in subqueries contained only in a SELECT statement.

C

 It will return an error if the undo retention time is less than the lower bound time or SCN specified.

D

 It retrieves all versions including the deleted as well as subsequently reinserted versions of the rows.

单选题 View the Exhibit and examine the structure of the ORDERS table. Which task would require subqueries?  ()

A

 displaying the total order value for sales representatives 161 and 163

B

 displaying the order total for sales representative 161 in the year 1999

C

 displaying the number of orders that have order mode online and order date in 1999

D

 displaying the number of orders whose order total is more than the average order total for all online orders

单选题 Evaluate the CREATE TABLE statement:   CREATE TABLE products   (product_id NUMBER (6)  CONSTRAINT prod_id_pk PRIMARY KEY,  product_name VARCHAR2 (15));   Which statement is true regarding the PROD_ID_PK constraint?()

A

 It would be created only if a unique index is manually created first.

B

 It would be created and would use an automatically created unique index.

C

 It would be created and would use an automatically created nonunique index.

D

 It would be created and remains in a disabled state because no index is specified in the command.

多选题 Which three statements are true regarding single-row functions?()

A

 They can accept only one argument.

B

 They can be nested up to only two levels.

C

 They can return multiple values of more than one data type.

D

 They can be used in SELECT, WHERE, and ORDER BY clauses.  

E

 They can modify the data type of the argument that is referenced.

F

 They can accept a column name, expression, variable name, or a user-supplied constant as arguments.

多选题 Which three tasks can be performed using regular expression support in Oracle Database 10g?()

A

 it can be used to concatenate two strings.

B

 it can be used to find out the total length of the string.

C

 it can be used for string manipulation and searching operations.

D

 it can be used to format the output for a column or expression having string data.

E

 it can be used to find and replace operations for a column or expression having string data.

单选题 The user SCOTT who is the owner of ORDERS and ORDERJTEMS tables issues the following  GRANT command:  GRANT ALL   ON orders, order_items   TO PUBLIC;   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 ORDERJTEMS tables.

单选题 View the Exhibit and examine the data in ORDERS_MASTER and MONTHLYjDRDERS tables. What would be the outcome of the above statement?()

A

 The ORDERS_MASTER table would contain the ORDERJDs 1 and 2.

B

 The ORDERS_MASTER table would contain the ORDERJDs 1, 2 and 3.

C

 The ORDERS_MASTER table would contain the ORDERJDs 1, 2 and 4.

D

 The ORDERS MASTER table would contain the ORDER IDs 1, 2, 3 and 4.

单选题 View the Exhibit and examine the structure of the ORDERS and ORDERJTEMS tables.  Evaluate the following SQL statement:   SELECT oi.order_id, product_jd, order_date   FROM order_items oi JOIN orders o   USING (order_id);   Which statement is true regarding the execution of this SQL statement?()

A

 The statement would not execute because table aliases are not allowed in the JOIN clause.

B

 The statement would not execute because the table alias prefix is not used in the USING clause.

C

 The statement would not execute because all the columns in the SELECT clause are not prefixed with table aliases.

D

 The statement would not execute because the column part of the USING clause cannot have a qualifier in the SELECT list.

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