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Oracle 1z1-071: Oracle Database SQL exam is a certification exam that is designed to test the SQL skills and knowledge of database professionals. 1z1-071 exam is intended for individuals who have a good understanding of SQL and want to become Oracle certified professionals. 1z1-071 exam is based on Oracle Database 12c and tests the candidates' ability to create, modify, and manage database objects, including data manipulation, data retrieval, and data control.
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Oracle 1Z0-071 Certification Exam Reference
NEW QUESTION # 134
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. 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
- B. Enclose the character literal string in the SELECT clause within double quotation marks
- C. Remove the single quotation marks enclosing the character literal string in the SELECT clause
- D. Use the escape character to negate the single quotation mark within the literal character string in the SELECT clause
Answer: A
Explanation:
Explanation
References:
http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements003.htm
NEW QUESTION # 135
Examine these statements executed in a single Oracle session:
CREATE TABLE product (pcode NUMBER(2),pname VARCHAR2(20));
INSERT INTO product VALUES(1,'pen');
INSERT INTO product VALUES (2,'pencil');
INSERT INTO product VALUES(3,'fountain pen');
SAVEPOINT a;
UPDATE product SET pcode=10 WHERE pcode =1;
COMMIT;
DELETE FROM product WHERE pcode =2;
SAVEPOINT b;
UPDATE product SET pcode=30 WHERE pcode =3;
SAVEPOINT c;
DELETE FROM product WHERE pcode =10;
ROLLBACK TO SAVEPOINT b;
COMMIT;
Which three statements are true?
- A. The code for pen is 10.
- B. There is no row containing pencil.
- C. The code for pen is 1.
- D. There is no row containing pen
- E. There is no row containing fountain pen.
- F. The code for fountain pen is 3
Answer: A,B,F
NEW QUESTION # 136
Which three statements are true? (Choose three.)
- A. Both USER_OBJECTS and CAT views provide the same information about all objects that are owned by the user.
- B. The USER_CONS_COLUMNS view should be queried to find the names of columns to which constraints apply.
- C. The usernames of all users including database administrators are stored in the data dictionary.
- D. Data dictionary views consist of joins of dictionary base tables and user-defined tables.
- E. Views with the same name but different prefixes, such as DBA, ALL and USER, reference the same base tables from the data dictionary.
- F. The data dictionary is created and maintained by the database administrator.
Answer: B,C,E
Explanation:
https://docs.oracle.com/cd/B10501_01/server.920/a96524/c05dicti.htm
NEW QUESTION # 137
Examine the description of the SALES table:
The SALES table has 5,000 rows.
Examine this statement:
CREATE TABLE sales1 (prod id, cust_id, quantity_sold, price)
AS
SELECT product_id, customer_id, quantity_sold, price
FROM sales
WHERE 1=1
Which two statements are true?
- A. SALES1 has NOT NULL constraints on any selected columns which had those constraints in the SALES table.
- B. SALES1 Is created with 5,000 rows.
- C. SALES1 is created with 1 row.
- D. SALES1 has PRIMARY KEY and UNIQUE constraints on any selected columns which had those constraints in the SALES table.
Answer: A,C
Explanation:
When creating a new table with a query, the statements that are true are:
* A. SALES1 is created with 1 row.This is incorrect actually; the given query with WHERE 1=1 will retrieve all rows from the sales table, not just one row. Therefore, SALES1 will be created with the same number of rows as in the SALES table, assuming there are no WHERE clause conditions limiting the rows.
* D. SALES1 has NOT NULL constraints on any selected columns which had those constraints in the SALES table.This is true. When a table is created using a CREATE TABLE AS SELECT statement, the NOT NULL constraints on the columns in the selected columns are preserved in the new table.
Options B and C are incorrect:
* B is incorrect because the primary key and unique constraints are not carried over to the new table when using the CREATE TABLE AS SELECT syntax.
* C is incorrect in the context of this scenario. However, if interpreted as a standalone statement (ignoring A), C would be the correct description of the outcome since WHERE 1=1 will not filter out any rows.
NEW QUESTION # 138
View the exhibit and examine the structure in ORDERS and ORDER_ITEMS tables.
You need to create a view that displays the ORDER_ID, ORDER_DATE, and the total number of items in each order.
Which CREATE VIEW statement would create the views successfully?
- A. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;
- B. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)
||"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_dateWHITH CHECK OPTION; - C. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;
- D. CREATE OR REPLACE VIEW ord_vu (order_id, order_date)AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;
Answer: A
NEW QUESTION # 139
Evaluate the following two queries:
SQL> SELECT cust_last_name, cust_city
FROM customers
WHERE cust_credit_limit IN (1000, 2000, 3000);
SQL> SELECT cust_last_name, cust_city
FROM customers
WHERE cust_credit_limit = 1000 or cust_credit_limit = 2000 or
cust_credit_limit = 3000
Which statement is true regarding the above two queries?
- A. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
- B. Performance would improve in query 2.
- C. Performance would degrade in query 2.
- D. There would be no change in performance.
Answer: D
Explanation:
Explanation/Reference:
References:
http://oraclexpert.com/restricting-and-sorting-data/
NEW QUESTION # 140
View the exhibit and examine the structure of the STORES table.
You must display the NAME of stores along with the ADDRESS, START_DATE, PROPERTY_PRICE, and the projected property price, which is 115% of property price.
The stores displayed must have START_DATE in the range of 36 months starting from 01-Jan-2000 and above.
Which SQL statement would get the desired output?
- A. SELECT name, concat(address||', '||city||', ', country) AS full_address, start_date,property_price, property_price*115/100FROM storesWHERE MONTHS_BETWEEN(start_date,TO_DATE('01-JAN-2000','DD-MON-RRRR')) <=36;
- B. SELECT name, concat(address||', '||city||', ',country) AS full_address, start_date, property_price, property_price*115/100FROM storesWHERE MONTHS_BETWEEN(start_date,'01-JAN-2000') <=36;
- C. SELECT name, concat(address||', '||city||', ',country) AS full_address, start_date,property_price, property_price*115/100FROM storesWHERE TO_NUMBER(start_date-TO_DATE('01-JAN-2000','DD-MON-RRRR')) <=36;
- D. SELECT name, address||', '||city||', '||country AS full_address, start_date,property_price, property_price*115/100FROM storesWHERE MONTHS_BETWEEN(start_date,TO_DATE('01-JAN-2000','DD-MON-RRRR')) <=36;
Answer: A
NEW QUESTION # 141
Examine these SQL statements which execute successfully:
Which two statements are true after execution?
- A. The foreign key constraint will be disabled.
- B. The primary key constraint will be enabled and DEFERRED.
- C. The primary key constraint will be enabled and IMMEDIATE.
- D. The foreign key constraint will be enabled and DEFERRED.
- E. The foreign key constraint will be enabled and IMMEDIATE.
Answer: C,E
Explanation:
After the execution of the given SQL statements:
* B. The primary key constraint will be enabled and IMMEDIATE. This is true. The last statement ENABLE CONSTRAINT emp_emp_no_pk; enables the primary key constraint immediately.
* E. The foreign key constraint will be enabled and IMMEDIATE. This is correct as well. The foreign key constraint emp_mgr_fk was not explicitly disabled, so it remains enabled and in the immediate checking mode.
Options A, C, and D are incorrect:
* A is incorrect because constraints are immediate by default; they are not deferred unless explicitly stated.
* C is incorrect because the foreign key constraint emp_mgr_fk was never disabled with the given statements.
* D is incorrect because there is no statement altering the foreign key constraint to a deferred state.
NEW QUESTION # 142
You execute the SQL statement:
What is the outcome?
- A. It fails because the NOT NULL and DEFAULToptions cannot be combined for the same column.
- B. It It succeeds and CITYcan contain only 'SEATTLE'or null for all rows.
- C. It succeeds and an index is created for CITIZEN_ID.
- D. It fails because the condition for the CNAMESconstraint is not valid.
Answer: C
NEW QUESTION # 143
Which statement is true about aggregate functions?
- A. Aggregate functions can be used in any clause of a SELECTstatement.
- B. The MAXand MINfunctions can be used on columns with character data types.
- C. Aggregate functions can be nested to any number of levels.
- D. The AVG function implicitly converts NULLSto zero.
Answer: C
Explanation:
Explanation/Reference: https://docs.oracle.com/database/121/SQLRF/functions003.htm
NEW QUESTION # 144
Examine the description of the BOOKS_TRANSACTIONS table:
Which two WHERE conditions give the same result?
- A. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' AND (member_id ='A101' OR member_id ='A102') );
- B. WHERE borrowed_date = SYSDATE AND transaction_type ='RM' OR member_id IN ('A101','A102');
- C. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' AND member_id='A101' OR member_id ='A102'));
- D. WHERE (borrowed_date = SYSDATE AND transaction_type ='RM') OR member_id IN ('A101','A102');
- E. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' OR member_id IN ('A101','A102'));
Answer: A,E
Explanation:
The WHERE clause in SQL filters the rows returned by the SELECT statement. The result of logical operators and conditions can change significantly depending on the use of parentheses.
Options A and E both use parentheses to ensure that borrowed_date = SYSDATE is evaluated with transaction_type ='RM' as one group and the member_id conditions as another group. The parentheses ensure that both conditions within each set of parentheses must be true for the rows to be included.
Option B is incorrect because it does not use parentheses to enforce the grouping of conditions, leading to potentially different results due to the way logical OR works.
Option C is incorrect because it has a syntax error; it is missing a parenthesis.
Option D is incorrect because it will return rows where either borrowed_date = SYSDATE AND transaction_type ='RM' is true or member_id IN ('A101','A102') is true, which is a broader condition than what's specified in options A and E.
NEW QUESTION # 145
Examine the command:
What does ON DELETE CASCADE imply?
- A. When a row in the BOOKStable is deleted, the rows in the BOOK_TRANSACTIONStable whose BOOK_ID matches that of the deleted row in the BOOKStable are also deleted.
- B. When the BOOKStable is dropped, all the rows in the BOOK_TRANSACTIONStable are deleted but the table structure is retained.
- C. When a value in the BOOKS.BOOK_IDcolumn is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_IDcolumn.
- D. When the BOOKStable is dropped, the BOOK_TRANSACTIONStable is dropped.
Answer: A
Explanation:
Explanation
NEW QUESTION # 146
Which statement executes successfully?
- A. SELECT TO_NUWBER(TO_DATE(INTERVAL '800' SECOND)) FROM DUAL;
- B. SELECT TO_DATE(INTERVAL '800' SECOND,'HH24:MM') FROM DUAL;
- C. SELECT TO_CHAR(INTERVAL '800' SECOND, 'HH24:MM') FROM DUAL;
- D. SELECT TO_DATE(TO_NUMBER(INTERVATL '800' SECOND)) FROM DUAL;
- E. SELECT TO_NUMBER(INTERVAL'800' SECOND, 'HH24:MM') FROM DUAL;
Answer: C
Explanation:
Oracle's interval data types store a period of time. When you want to format an interval as a string, you can use the TO_CHAR function.
A). This statement will not execute successfully because TO_DATE expects a string representing a date, not a number derived from an interval.
B). This statement will not execute successfully because TO_NUMBER does not support interval data types as an input.
C). This statement will not execute successfully because TO_DATE does not support interval data types as an input.
D). This statement will not execute successfully because TO_NUMBER expects a number or a string representing a number as an argument, not a date.
E). This statement will execute successfully. TO_CHAR function can be used to convert interval values to a formatted string, such as 'HH24:MM'.
NEW QUESTION # 147
Which statement is true regarding the USINGclause in table joins? (Choose two.)
- A. It can be used to join a maximum of three tables.
- B. It can be used to join tables that have columns with the same name and compatible data types.
- C. It can be used to access data from tables through equijoins as well as nonequijoins.
- D. It can be used to restrict the number of columns used in a NATURALjoin.
Answer: B,D
Explanation:
Explanation
NEW QUESTION # 148
Examine the command:
What does ON DELETE CASCADE imply?
- A. When a row in the BOOKS table is deleted, the rows in the BOOK_TRANSACTIONS table whose BOOK_ID matches that of the deleted row in the BOOKS table are also deleted.
- B. When the BOOKS table is dropped, the BOOK_TRANSACTIONS table is dropped.
- C. When a value in the BOOKS.BOOK_ID column is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_ID column.
- D. When the BOOKS table is dropped, all the rows in the BOOK_TRANSACTIONS table are deleted but the table structure is retained.
Answer: A
NEW QUESTION # 149
Which two statements are true about substitution variables?
- A. A substitution variable used to prompt for a column name must be endorsed in single quotation marks.
- B. A substitution variable prefixed with & always prompts only once for a value in a session.
- C. A substitution variable can be used only in a SELECT statement.
- D. A substitution variable can be used with any clause in a SELECT statement.
- E. A substitution variable prefixed with 6 prompts only once for a value in a session unless is set to undefined in the session.
- F. A substitution variable used to prompt for a column name must be endorsed in double quotation marks.
Answer: B,D
Explanation:
Substitution variables in Oracle are used to replace a value dynamically during the execution of SQL statements. The behavior of these variables is well-documented:
* C. A substitution variable prefixed with & always prompts only once for a value in a session: This is true. In a session, when you use a single ampersand (&), SQL*Plus or SQL Developer will prompt for the value the first time the variable is encountered. The value for this variable will then be reused for the remainder of the session unless it is redefined.
* D. A substitution variable can be used with any clause in a SELECT statement: Substitution variables can be placed in any part of a SQL statement, including the SELECT, WHERE, GROUP BY, ORDER BY, etc. They are not limited to any specific clause.
References:
* Oracle SQL*Plus User's Guide and Reference, which discusses substitution variables.
NEW QUESTION # 150
Examine the create table statements for the stores and sales tables.
SQL> CREATE TABLE stores(store_id NUMBER(4) CONSTRAINT store_id_pk PRIMARY KEY, store_name VARCHAR2(12), store_address VARCHAR2(20), start_date DATE); SQL> CREATE TABLE sales(sales_id NUMBER(4) CONSTRAINT sales_id_pk PRIMARY KEY, item_id NUMBER(4), quantity NUMBER(10), sales_date DATE, store_id NUMBER(4), CONSTRAINT store_id_fk FOREIGN KEY(store_id) REFERENCES stores(store_id)); You executed the following statement:
SQL> DELETE from stores
WHERE store_id=900;
The statement fails due to the integrity constraint error:
ORA-02292: integrity constraint (HR.STORE_ID_FK) violated
Which three options ensure that the statement will execute successfully?
- A. Disable the primary key in the STORES table.
- B. DELETE the rows with STORE_ID = 900 from the SALES table and then delete rows from STORES table.
- C. Disable the FOREIGN KEY in SALES table and then delete the rows.
- D. Use CASCADE keyword with DELETE statement.
- E. Create the foreign key in the SALES table on SALES_ID column with on DELETE CASCADE option.
Answer: B,C,E
NEW QUESTION # 151
Examine these SQL statements which execute successfully:
Which two statements are true after execution?
- A. The primary key constraint will be enabled and DEFERRED.
- B. The primary key constraint will be enabled and IMMEDIATE.
- C. The foreign key constraint will be disabled.
- D. The foreign key constraint will be enabled and DEFERRED.
- E. The foreign key constraint will be enabled and IMMEDIATE.
Answer: B,C
NEW QUESTION # 152
The INVOICE table has a QTY_SOLD column of data type NUMBER and an INVOICE_DATE column of data type DATE.
NLS_DATE_FORMAT is set to DD-MON-RR.
Which two are true about data type conversions involving these columns in query expressions? (Choose two.)
- A. qty_sold BETWEEN '101' AND '110' : uses implicit conversion
- B. invoice_date > '01-02-2019' : uses implicit conversion
- C. CONCAT(qty_sold, invoice_date) : requires explicit conversion
- D. qty_sold = '0554982' : requires explicit conversion
- E. invoice_date = '15-march-2019' : uses implicit conversion
Answer: A,E
NEW QUESTION # 153
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Oracle 1z0-071 (Oracle Database SQL) certification exam is a widely recognized certification exam designed for individuals who want to prove their knowledge in SQL and database management. 1z1-071 exam is a one-step certification exam that covers a wide range of topics, including database concepts, SQL syntax, data modeling, and database administration. Oracle Database SQL certification exam is intended for database administrators, developers, and IT professionals who want to demonstrate their expertise in SQL.
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