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Oracle Database SQL Sample Questions (Q53-Q58):

NEW QUESTION # 53
You execute the following commands:

For which substitution variables are you prompted for the input?

A. Both the substitution variables 'hiredate' and 'mgr_id\
B. Only 'mgr_id'
C. Only 'hiredate'
D. None, because no input required

Answer: A

NEW QUESTION # 54
You want to display 5 percent of the rows from the SALEStable for products with the lowest AMOUNT_SOLD and also want to include the rows that have the same AMOUNT_SOLDeven if this causes the output to exceed 5 percent of the rows.
Which query will provide the required result?
SELECT prod_id, cust_id, amount_sold

A. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS WITH TIES ONLY;
SELECT prod_id, cust_id, amount_sold
B. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS WITH TIES;
SELECT prod_id, cust_id, amount_sold
C. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS ONLY WITH TIES;
SELECT prod_id, cust_id, amount_sold
D. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS ONLY;

Answer: B

NEW QUESTION # 55
Which three statements are true regarding indexes?

A. A table belonging to one user can have an index that belongs to a different user,
B. An update to a table can result in no updates to any of the table's indexes.
C. A UNIQUE index can be altered to be non-unique.
D. An update to a table can result in updates to any or all of the table's indexes.
E. When a table is dropped and is moved to the RECYCLE BIN, all Indexes built on that table are permanently dropped.
F. A SELECT statement can access one or more indices without accessing any tables.

Answer: A,B,E

NEW QUESTION # 56
You executed the following CREATE TABLE statement that resulted in an error:
SQL> CREATE TABLE employees(emp_id NUMBER(10) PRIMARY KEY, ename VARCHAR2(20), email NUMBER(3) UNIQUE, address VARCHAR2(500), phone VARCHAR2(20), resume LONG, hire_date DATE, remarks LONG, dept_id NUMBER(3) CONSTRAINT emp_dept_id_fk REFERENCES departments (dept_id), CONSTRAINT ename_nn NOY NULL(ename)); Identify two reasons for the error.

A. The NOT NULLconstraint on the ENAMEcolumn must be defined as the column level
B. The FOREIGN KEYkeyword is missing in the constraint definition
C. Only one LONGcolumn can be used per table
D. FOREIGN KEYdefined on the DEPT_IDcolumn must be at the table level only
E. The PRIMARY KEYconstraint in the EMP_IDcolumn must have a name and must be defined at the table level only

Answer: A,C

NEW QUESTION # 57
Which two statements are true about date/time functions in a session where NLS_DATE_FORMATis set to DD- MON-YYYY HH24:MI:SS? (Choose two.)

A. CURRENT_TIMESTAMPreturns the same date as CURRENT_DATE.
B. SYSDATEand CURRENT_DATEreturn the current date and time set for the operating system of the database server.
C. CURRENT_TIMESTAMPreturns the same date and time as SYSDATEwith additional details of fractional seconds.
D. SYSDATEcan be queried only from the DUALtable.
E. SYSDATEcan be used in expressions only if the default date format is DD-MON-RR.
F. CURRENT_DATEreturns the current date and time as per the session time zone.

Answer: D,F

Explanation:
Explanation/Reference:

NEW QUESTION # 58
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