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.
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A. The nested query executes after the outer query returns the row.
B. The nested query executes first and then the outer query executes.
C. The outer query executes only once for the result returned by the inner query.
D. Each row returned by the outer query is evaluated for the results returned by the inner query.
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.
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.
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.
EMPDET is an external table containing the columns EMPNO and ENAME.
Which command would work in relation to the EMPDET table? ()
A.A
B.B
C.C
D.D
A. ’os’
B. local
C. -8:00’
D. dbtimezone Li
E. ’Australia’
最新试题
EMPDET is an external table containing the columns EMPNO and ENAME. Which command would work in relation to the EMPDET table?()
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? ()
Which statement is true regarding Flashback Version Query? ()
Which statements are correct regarding indexes? ()
View the Exhibit and examine the data in the PRODUCT INFORMATION table.Which two tasks would require subqueries? ()
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?()
Which three possible values can be set for the TIME_ZONE session parameter by using the ALTER SESSION command? ()
View the Exhibit and examine the structure of the ORDERS table.Which task would require subqueries? ()
The details of the order ID, order date, order total, and customer ID are obtained from the ORDERS table. If the order value is more than 30000, the details have to be added to the LARGEjDRDERS table. The order ID, order date, and order total should be added to the ORDERJHISTORY table, and order ID and customer ID should be added to the CUSTJHISTORY table. Which multitable INSERT statement would you use? ()
View the Exhibit and examine the details of the EMPLOYEES table. The query was written to format the PHONE_NUMBER for the employees. Which option would be the correct format in the output?()