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Oracle Database SQL Sample Questions (Q269-Q274):

NEW QUESTION # 269
Examine the data in the PRODUCTS table:

Examine these queries:
1. SELECT prod name, prod list
FROM products
WHERE prod 1ist NOT IN(10,20) AND category _id=1;
2. SELECT prod name, | prod _ list
FROM products
WHERE prod list < > ANY (10,20) AND category _id= 1;
SELECT prod name, prod _ list
FROM products
WHERE prod_ list <> ALL (10, 20) AND category _ id= 1;
Which queries generate the same output?

A. 1, 2 and 3
B. 1 and 3
C. 1 and 2
D. 2 and 3

Answer: B

NEW QUESTION # 270
Evaluate the following SELECTstatement and view the exhibit to examine its output:
SELECT constraint_name, constraint_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 R_CONSTRAINT_NAMEcolumn gives the alternative name for the constraint.
B. In the second column, 'c'indicates a check constraint.
C. The column DELETE_RULEdecides the state of the related rows in the child table when the corresponding row is deleted from the parent table.
D. The STATUScolumn indicates whether the table is currently in use.

Answer: B,C

NEW QUESTION # 271
View the Exhibit and examine the details of the PRODUCT_INFORMATIONtable.
Exhibit

You must display PRODUCT_NAME from the table where the CATEGORY_IDcolumn has values 12or 13, and the SUPPLIER_IDcolumn has the value 102088.
You executed this SQL statement:

Which statement is true regarding the execution?

A. It would not execute because the entire WHEREclause is not enclosed within parentheses.
B. It would execute and return the desired result.
C. It would not execute because the same column has been used twice with the ANDlogical operator.
D. It would execute but would return no rows.

Answer: D

NEW QUESTION # 272
You execute these commands:
SQL> DEFINE hiredate = '01-APR -2011';
SQL> SELECT employee_id, first_name, salary FROM employees WHERE hire date > &hiredate AND manager_id >&mgr_id; For which substitution variables will you be prompted?

A. &hiredate and &mgr_id
B. only &mgr_id
C. only &hiredate
D. none

Answer: B

NEW QUESTION # 273
Which is true about the & and && prefixes with substitution variables?

A. Both & and && can prefix a substitution variable name in queries and DML statements.
B. The && prefix will not prompt for a value even if the substitution variable is not previously defined in the session.
C. & can prefix a substitution variable name only in queries. DML
D. An & prefix to an undefined substitution variable, which is referenced twice in the same query, will prompt for a value twice .
E. An && prefix to an undefined substitution variable, which is referenced multiple times in multiple queries, will prompt for a value once per query.

Answer: A

Explanation:
E). True. Both & and && can prefix substitution variables in queries as well as in DML statements. & is used for defining a substitution variable that prompts the user every time the variable is encountered. && is used for a persistent substitution variable that, once defined in the session, will not prompt the user again for a value if used subsequently.

NEW QUESTION # 274
......

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