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[Hardware] 1z0-071 Valid Practice Materials | Learning 1z0-071 Materials

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【Hardware】 1z0-071 Valid Practice Materials | Learning 1z0-071 Materials

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Oracle Database SQL Sample Questions (Q12-Q17):NEW QUESTION # 12
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 6,00,00,000000 AM
  • D. 11-JUL-2019 11,00,00,00000000 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 # 13
You need to calculate the number of days from 1st January 2019 until today.
Dates are stored in the default format of DD-MON-RR.
Which two queries give the required output?
  • A. SELECT ROUND (SYSDATE- '01-JAN-2019') FROM DUAL:
  • B. SELECT TO_DATE (SYSDATE, 'DD/MONTH/YYYY')-'01/JANUARY/2019' FROM DUAL;
  • C. SELECT TO_CHAR (SYSDATE, 'DD-MON-YYYY')-'01-JAN-2019' FROM DUAL;
  • D. SELECT ROUND (SYSDATE-TO_DATE ('01/JANUARY/2019')) FROM DUAL;
  • E. SELECT SYSDATE-TO_DATE ('01-JANUARY-2019') FROM DUAL;
Answer: D,E
Explanation:
To calculate the number of days between two dates in Oracle SQL, you can simply subtract the earlier date from the later date, and Oracle will return the number of days between them.
Option A uses SYSDATE to get the current date and TO_DATE to convert the string '01-JANUARY-2019' to a date using the default date format, which matches 'DD-MON-RR'. The subtraction here will correctly give the number of days between these two dates.
Option C is similar to A but includes the ROUND function, which is used to round the number to the nearest whole number. Since the difference between two dates in Oracle SQL is a decimal value representing the number of days and fractional days, rounding will give us the whole number of days, which is what we want.
Options B, D, and E are incorrect because they either use an invalid date format (the default format is
'DD-MON-RR', not 'DD/MONTH/YYYY' or 'DD-MON-YYYY'), perform invalid operations (such as subtracting a string from a date), or misuse SYSDATE.

NEW QUESTION # 14
A non-correlated subquery can be defined as __________. (Choose the best answer.)
  • A. A SELECT statement that can be embedded in a clause of another SELECT statement only.
  • B. A set of sequential queries, all of which must always return a single value.
  • C. A set of one or more sequential queries in which generally the result of the inner query is used as the search value in the outer query.
  • D. A set of sequential queries, all of which must return values from the same table.
Answer: C

NEW QUESTION # 15
Examine the structure of the SALES table.

Examine this statement:

Which two statements are true about the SALES1 table? (Choose two.)
  • A. It is created with no rows.
  • B. It will have NOT NULL constraints on the selected columns which had those constraints in the SALES table.
  • C. It will not be created because of the invalid WHERE clause.
  • D. It will not be created because the column-specified names in the SELECT and CREATE TABLE clauses do not match.
  • E. It has PRIMARY KEY and UNIQUE constraints on the selected columns which had those constraints in the SALES table.
Answer: A,B

NEW QUESTION # 16
View the Exhibit and examine the data in the PRODUCTS table. (Choose the best answer.) You must display product names from the PRODUCTS table that belong to the
'Software/other' category with minimum prices as either $2000 or $4000 and with no unit of measure.
You issue this query:
SQL > SELECT prod_name, prod_category, prod_min_price FROM products
Where prod_category LIKE '%Other%' AND (prod_min_price = 2000 OR prod_min_price
4000) AND prod_unit_of_measure <> ' ';
Which statement is true?
  • A. It generates an error because the condition specified for PROD_UNIT_OF_MEASURE is not valid.
  • B. It generates an error because the condition specified for the PROD_CATEGORY column is not valid.
  • C. It executes successfully but returns no result.
  • D. It executes successfully and returns the required result.
Answer: C

NEW QUESTION # 17
......
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