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Oracle Database SQL Sample Questions (Q175-Q180):

NEW QUESTION # 175
Examine the commands used to create DEPARTMENT_DETAILS and COURSE_DETAILS tables:

You want to generate a list of all department IDs that do not exist in the COURSE_DETAILS table.
You execute the SQL statement:

What is the outcome?

A. It executes successfully and displays the required list.
B. It executes successfully but displays an incorrect list.
C. It fails because the ON clause condition is not valid.
D. It fails because the join type used is incorrect.

Answer: A

NEW QUESTION # 176
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 orders
WHERE order_total < 1000;
B. DELETE orders o, order_items i
WHERE o.order_id = i.order_id;
C. DELETE order_id
FROM orders
WHERE order_total < 1000;
D. DELETE
FROM orders
WHERE (SELECT order_id
FROM order_items);

Answer: A

NEW QUESTION # 177
Examine these statements which execute successfully:
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH24 MI: SS'
ALTER SESSION SET TIME_ ZONE = '-5:00';
SELECT DBTIMEZONE, SYSDATE FROM DUAL
Examine the result:

If LOCALTIMESTAMP was selected at the same time what would it return?

A. 11-JUL-2019 11,00,00,000000AM -05:00
B. 11-JUL-2019 6,00,00,00000000 AM - 05:00
C. 11-JUL-2019 11,00,00,00000000 AM
D. 11-JUL-2019 6,00,00,000000 AM

Answer: B

Explanation:
The LOCALTIMESTAMP function in Oracle Database returns the current date and time in the session time zone. Given that the session time zone was set to -5:00 with the ALTER SESSION SET TIME_ZONE command, LOCALTIMESTAMP will return the date and time adjusted to this session time zone.
The SYSDATE function, on the other hand, returns the current date and time from the operating system of the database server, which is not affected by the session time zone setting. In the result shown, SYSDATE returns 11-JUL-2019 11:00:00, which reflects the system time zone, not the session time zone.
The time difference between the DBTIMEZONE (+00:00) and the session time zone (-5:00) is 5 hours. Since SYSDATE shows the time as 11:00:00 in the system time zone, the LOCALTIMESTAMP adjusted to the session time zone would show the time as 06:00:00.
The correct answer is A: 11-JUL-2019 6:00:00.00000000 AM - 05:00. This represents the local timestamp in the session time zone, which is 5 hours behind the DBTIMEZONE.
Please note that the exact format returned by LOCALTIMESTAMP includes the fractional seconds up to 9 decimal places, and the time zone offset is specified as part of the timestamp.

NEW QUESTION # 178
You must create a table for a banking application. (Choose the best answer.) One of the columns in the table has these requirements:
1: A column to store the duration of a short team loan
2: The data should be stored in a format supporting DATE arithmetic with DATE datatypes without using conversion functions.
3: The maximum loan period is 30 days.
4: Interest must be calculated based on the number of days for which the loan remains unpaid.
Which data type would you use?

A. Interval day to second
B. Number
C. Date
D. Interval year to month
E. Timestamp

Answer: A

NEW QUESTION # 179
View the exhibit and examine the structure of the PROMOTIONS table.

You have to generate a report that displays the promo name and start date for all promos that started after the last promo in the 'INTERNET' category.
Which query would give you the required output?

A. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date > ALL (SELECT promo_begin_dateFROM promotionsWHERE promo_category = 'INTERNET');
B. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date> ALL (SELECT MAX (promo_begin_date)FROM promotions) ANDpromo_category= 'INTERNET';
C. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date IN (SELECT promo_begin_dateFROM promotionsWHERE promo_category= 'INTERNET');
D. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date> ANY (SELECT promo_begin_dateFROM promotionsWHERE promo_category= 'INTERNET');

Answer: A

NEW QUESTION # 180
......

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