1z0-047 Guide

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  • Oracle
  • Exam Number/Code 1z0-047
  • Product Name Oracle Database SQL Expert
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  • 260 Q&As
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  • Jan 15,2018
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oracle database sql expert 1z0 047 : Jan 2018 Edition

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Q81. Which statements are correct regarding indexes? (Choose all that apply.) 

A. When a table is dropped, the corresponding indexes are automatically dropped. 

B. For each DML operation performed, the corresponding indexes are automatically updated. 

C. Indexes should be created on columns that are frequently referenced as part of an expression. 

D. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a unique index. 

Answer: ABD


Q82. View the Exhibit and examine the data in the PRODUCTS table. 

Which statement would add a column called PRICE, which cannot contain NULL? 

A. ALTER TABLE products 

ADD price NUMBER(8,2) NOT NULL; 

B. ALTER TABLE products 

ADD price NUMBER(8,2) DEFAULT NOT NULL; 

C. ALTER TABLE products 

ADD price NUMBER(8,2) DEFAULT 0 NOT NULL; 

D. ALTER TABLE products 

ADD price NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL; 

Answer: C


Q83. View the Exhibit and examine the description of the ORDERS table. 

Evaluate the following SQL statement: 

SELECT order_id, customer_id 

FROM orders 

WHERE order_date > 'June 30 2001' 

Which statement is true regarding the execution of this SQL statement? 

A. It would not execute because 'June 30 2001' in the WHERE condition is not enclosed within double quotation marks. 

B. It would execute and would return ORDER_ID and CUSTOMER_ID for all records having ORDER_DATE greater than 'June 30 2001'. 

C. It would not execute because 'June 30 2001' in the WHERE condition cannot be converted implicitly and needs the use of the TO_DATE conversion function for proper execution. 

D. It would not execute because 'June 30 2001' in the WHERE condition cannot be converted implicitly and needs the use of the TO_CHAR conversion function for proper execution. 

Answer: C


Q84. Which three statements are true regarding group functions? (Choose three.) 

A. They can be used on columns or expressions. 

B. They can be passed as an argument to another group function. 

C. They can be used only with a SQL statement that has the GROUP BY clause. 

D. They can be used on only one column in the SELECT clause of a SQL statement. 

E. They can be used along with the single-row function in the SELECT clause of a SQL statement. 

Answer: ABE


Q85. You need to create a table with the following column specifications: 

1. Employee ID (numeric data type) for each employee 

2. Employee Name, (character data type) which stores the employee name 

3. Hire date, to store the date when the employee joined the organization 

4. Status (character data type). It should contain the value if no data is entered. 

5. Resume (character large object [CLOB] data type), which would contain the resume submitted by the employee 

Which is the correct syntax to create this table? 

A. CREATETABLEEMP_1 

(emp_id NUMBER(4), 

emp_name VARCHAR2(25), 

start_dateDATE, 

e_status VARCHAR2(10) DEFAULTACTIVE', 

resume CLOB(200)); 

B. CREATETABLE1_EMP 

(emp_idNUMBER(4), 

emp_nameVARCHAR2(25), 

start_dateDATE, 

emp_status VARCHAR2(10) DEFAULT ACTIVE', 

resume CLOB); 

C. CREATETABLE1_EMP 

(emp_id NUMBER(4), 

emp_name VARCHAR2(25),start_date DATE, 

emp_status VARCHAR2(10) DEFAULT "ACTIVE", 

resume CLOB); 

D. CREATE TABLEEMP_1 

(emp_id NUMBER, emp_nameVARCHAR2(25), 

start_dateDATE, 

emp_statusVARCHAR2(10) DEFAULTACTIVE', 

resume CLOB); 

Answer: D


Q86. Which statement correctly differentiates a system privilege from an object privilege? 

A. System privileges can be granted only by the DBA whereas object privileges can be granted by DBAs or the owner of the object. 

B. System privileges give the rights to only create user schemas whereas object privileges give rights to manipulate objects in a schema. 

C. Users require system privileges to gain access to the database whereas they require object privileges to create objects in the database. 

D. A system privilege is the right to perform specific activities in a database whereas an object privilege is a right to perform activities on a specific object in the database. 

Answer: D


Q87. Which statement best describes the GROUPING function? 

A. It is used to set the order for the groups to be used for calculating the grand totals and subtotals. 

B. It is used to form various groups to calculate total and subtotals created using ROLLUP and CUBE operators. 

C. It is used to identify if the NULL value in an expression is a stored NULL value or created by ROLLUP or CUBE. 

D. It is used to specify the concatenated group expressions to be used for calculating the grand totals and subtotals. 

Answer: C


Q88. View the Exhibit and examine the description of the ORDERS table. 

Which two WHERE clause conditions demonstrate the correct usage of conversion functions? (Choose two.) 

A. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY") 

B. WHERE TO_CHAR(order_date,'MON DD YYYY} = 'JAN 20 2003' 

C. WHERE order_date > T0_CHAR(ADD_M0NTHS(SYSDATE,6),'M0N DD YYYY’) 

D. WHERE order_date IN (T0_DATE('0ct 21 2003','Mon DD YYYY’), T0_CHAR('N0V 21 2003','Mon DD YYYY’)) 

Answer: AB


Q89. View the Exhibit and examine the structure for the ORDERS and ORDER_ITEMS tables. 

You want to display ORDER_ID, PRODUCT_ID, and TOTAL (UNIT_PRICE multiplied by QUANTITY) for all the orders placed in the last seven days. 

Which query would you execute? 

A. SELECT orde_id, product_id, unit_price*quantity "TOTAL" 

FROM order_items oi JOIN orders o 

ON (o.order_id=oi. order_id) 

WHERE o.order_date>=SYSDATE-7; 

B. SELECT o.order_id,oi.product_id, oi.unit_price*oi.quantity "TOTAL" 

FROM order_items oi JOIN orders o 

USING (order_id) 

WHERE o.order_date>=SYSDATE-7; 

C. SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" 

FROM order_items oi JOIN orders o 

WHERE o.order_date>=SYSDATE-7 ON (o.order_id=oi. order_id); 

D. SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" 

FROM orde_items oi JOIN orders o 

ON (o.order_id=oi. order_id) 

WHERE o. order date>=SYSDATE-7; 

Answer: D


Q90. View the Exhibit and examine the structure of the ORDERS table: 

The ORDER_ID column has the PRIMARY KEY constraint and CUSTOMER_ID has the NOT NULL constraint. 

Evaluate the following statement: 

INSERT INTO (SELECT order_id.order_date.customer_id FROM ORDERS WHERE order_total = 1000 WITH CHECK OPTION) VALUES (13, SYSDATE, 101); 

What would be the outcome of the above INSERT statement? 

A. It would execute successfully and the new row would be inserted into a new temporary table created by the subquery. 

B. It would execute successfully and the ORDER_TOTAL column would have the value 1000 inserted automatically in the new row. 

C. It would not execute successfully because the ORDER_TOTAL column is not specified in the SELECT list and no value is provided for it. 

D. It would not execute successfully because all the columns from the ORDERS table should have been included in the SELECT list and values should have been provided for all the columns. 

Answer: C


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