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Oracle 1z0-071 is an exam that tests the knowledge of candidates in SQL and its applications in the Oracle Database. 1z0-071 exam is designed by Oracle, which is one of the leading technology companies in the world. The Oracle 1z0-071 exam is intended for individuals who want to become proficient in SQL programming, particularly in the context of the Oracle Database environment.

Oracle 1z0-071 certification exam is a challenging exam that requires extensive knowledge and skills in SQL programming and Oracle database management. 1z0-071 Exam covers a range of topics, including SQL SELECT statements, data manipulation, table creation and management, and database security. Candidates who pass the exam will have demonstrated their proficiency in these areas and will be recognized as experts in SQL programming and Oracle database management.

Oracle Database SQL Sample Questions (Q339-Q344):

NEW QUESTION # 339
View the exhibit and examine the description of SALES and PROMOTIONS tables.

You want to delete rows from the SALES table, where the PROMO_NAME column in the PROMOTIONS table has either blowout sale or everyday low price as values.
Which three DELETE statements are valid? (Choose three.)

A. DELETEFROM salesWHERE promo_id IN (SELECT promo_idFROM promotionsWHERE promo_name IN = 'blowout sale','everyday low price'));
B. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promo_name = 'blowout sale')AND promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')FROM promotionsWHERE promo_name = 'everyday low price');
C. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')
D. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_name = 'everyday low price');

Answer: A,C,D

NEW QUESTION # 340
Which two statements are true regarding the USINGand ONclauses in table joins?

A. Both USINGand ONclauses can be used for equijoins and nonequijoins.
B. The WHEREclause can be used to apply additional conditions in SELECTstatements containing the ON or the USINGclause.
C. A maximum of one pair of columns can be joined between two tables using the ONclause.
D. The ON clause can be used to join tables on columns that have different names but compatible data types.

Answer: B,D

Explanation:
Explanation/Reference:

NEW QUESTION # 341
Evaluate the following SQL statement:
SELECT product_name || 'it's not available for order'
FROM product_information
WHERE product_status = 'obsolete';
You received the following error while executing the above query:
ERROR
ORA-01756: quoted string not properly terminated
What would you do to execute the query successfully?

A. Remove the single quotation marks enclosing the character literal string in the SELECT clause
B. Use the escape character to negate the single quotation mark within the literal character string in the SELECT clause
C. Enclose the character literal string in the SELECT clause within double quotation marks
D. Use the Oracle (q) operator and delimiter to allow the use of a single quotation mark within the literal character string in the SELECT clause

Answer: D

Explanation:
Explanation
References:
http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements003.htm

NEW QUESTION # 342
Which two statements are true about the COUNT function?

A. COUNT(*) returns the number of rows in a table including duplicate rows and rows containing NULLs in any column.
B. It can only be used for NUMBER data types.
C. COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULLs in the INV_AMT column
D. COUNT(inv_amt) returns the number of rows in a table including rows with NULL in the INV_AMT column.
E. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.

Answer: A,C

Explanation:
The COUNT function is one of the most commonly used aggregate functions in SQL for determining the number of items in a group. Here's why the correct answers are B and C:
* A: Incorrect. COUNT can be used with any data type, not just NUMBER. It counts rows without regard to data type.
* B: Correct. COUNT(DISTINCT inv_amt) counts the number of unique non-null values in the column inv_amt. It excludes duplicates and ignores NULL values.
* C: Correct. COUNT(*) counts all rows in a table, including those with duplicates and those with NULLs in any column. It is a total row count regardless of content.
* D: Incorrect. You can use a WHERE clause with COUNT. The WHERE clause filters rows before counting, which is standard in SQL.
* E: Incorrect. COUNT(inv_amt) counts the rows where inv_amt is not NULL. Rows with NULL in the inv_amt column are not counted.

NEW QUESTION # 343
View the exhibit and examine the ORDERStable.
ORDERS
Null? Type
Name
ORDER ID NOT NULL NUMBER(4)
ORDATE DATE DATE
CUSTOMER ID NUMBER(3)
ORDER TOTAL NUMBER(7,2)
The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?

A. ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
B. ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
C. ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
D. ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

Answer: A

NEW QUESTION # 344
......

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