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Q31. View the Exhibit and examine the structure of the customers table. 

NEW_CUSTOMERS is a new table with the columns CUST_ID, CUST_NAME and CUST_CITY that have the same data types and size as the corresponding columns in the customers table. 

Evaluate the following insert statement: The insert statement fails when executed. 

What could be the reason? 

A. The values clause cannot be used in an INSERT with a subquery. 

B. Column names in the NEW_CUSTOMERS and CUSTOMERS tables do not match. 

C. The where clause cannot be used in a subquery embedded in an INSERT statement. 

D. The total number of columns in the NEW_CUSTOMERS table does not match the total number of columns in the CUSTOMERS table. 

Answer:

Explanation: 

Copying Rows from Another Table 

Write your INSERT statement with a subquery: 

Do not use the VALUES clause. 

Match the number of columns in the INSERT clause to those in the subquery. 

Inserts all the rows returned by the subquery in the table, sales_reps. 

Q32. Examine the structure proposed for the transactions table: 

Which two statements are true regarding the creation and storage of data in the above table structure? 

A. The CUST_STATUS column would give an error. 

B. The TRANS_VALIDITY column would give an error. 

C. The CUST_STATUS column would store exactly one character. 

D. The CUST_CREDIT_LIMIT column would not be able to store decimal values. 

E. The TRANS_VALIDITY column would have a maximum size of one character. 

F. The TRANS_DATE column would be able to store day, month, century, year, hour, minutes, seconds, and fractions of seconds 

Answer: B,C 

Explanation: 

VARCHAR2(size)Variable-length character data (A maximum size must be specified: 

minimum size is 1; maximum size is 4, 000.) 

CHAR [(size)] Fixed-length character data of length size bytes (Default and minimum size 

is 1; maximum size is 2, 000.) 

NUMBER [(p, s)] Number having precision p and scale s (Precision is the total number of 

decimal digits and scale is the number of digits to the right of the decimal point; precision 

can range from 1 to 38, and scale can range from –84 to 127.) 

DATE Date and time values to the nearest second between January 1, 4712 B.C., and 

December 31, 9999 A.D. 

Q33. You want to display 5 percent of the rows from the sales table for products with the lowest AMOUNT_SOLD and also want to include the rows that have the same AMOUNT_SOLD even if this causes the output to exceed 5 percent of the rows. 

Which query will provide the required result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q34. View the Exhibit and examine the data in the promotions table. 

PROMO_BEGIN_DATE is stored in the default date format, dd-mon-rr. 

You need to produce a report that provides the name, cost, and start date of all promos in the post category that were launched before January 1, 2000. 

Which SQL statement would you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q35. View the Exhibit and examine the structure of the customers table. 

Using the customers table, you need to generate a report that shows the average credit limit for customers in Washington and NEW YORK. 

Which SQL statement would produce the required result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q36. View the Exhibit and examine the structure of the products table. 

All products have a list price. 

You issue the following command to display the total price of each product after a discount of 25% and a tax of 15% are applied on it. Freight charges of $100 have to be applied to all the products. 

What would be the outcome if all the parentheses are removed from the above statement? 

A. It produces a syntax error. 

B. The result remains unchanged. 

C. The total price value would be lower than the correct value. 

D. The total price value would be higher than the correct value. 

Answer:

Q37. Evaluate the following query: 

SQL> SELECT TRUNC(ROUND(156.00, -1), -1) 

FROM DUAL; 

What would be the outcome? 

A. 16 

B. 100 

C. 160 

D. 200 

E. 150 

Answer:

Explanation: 

Function Purpose ROUND(column|expression, n) Rounds the column, expression, or value to n decimal places or, if n is omitted, no decimal places (If n is negative, numbers to the left of decimal point are rounded.) TRUNC(column|expression, n) Truncates the column, expression, or value to n decimal places or, if n is omitted, n defaults to zero 

Q38. 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. Use CASCADE keyword with DELETE statement. 

C. DELETE the rows with STORE_ID = 900 from the SALES table and then delete rows from STORES table. 

D. Disable the FOREIGN KEY in SALES table and then delete the rows. 

E. Create the foreign key in the SALES table on SALES_ID column with on DELETE CASCADE option. 

Answer: A,C,D 

Q39. Examine the structure of the employees table. 

You want to display the maximum and minimum salaries of employees hired 1 year ago. Which two statements would get the correct output? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: B,D 

Explanation: 

http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=%2Fcom.ibm.db2z1 0.doc.sqlref%2Fsrc%2Ftpc%2Fdb2z_sql_subselectexamples.htm.

Q40. Evaluate the following query: 

What would be the outcome of the above query? 

A. It produces an error because flower braces have been used. 

B. It produces an error because the data types are not matching. 

C. It executes successfully and introduces an 's at the end of each PROMO_NAME in the output. 

D. It executes successfully and displays the literal "{'s start date was \\} * for each row in the output. 

Answer: C Explanation: 

So, how are words that contain single quotation marks dealt with? There are essentially two mechanisms available. The most popular of these is to add an additional single quotation mark next to each naturally occurring single quotation mark in the character string 

Oracle offers a neat way to deal with this type of character literal in the form of the alternative quote (q) operator. Notice that the problem is that Oracle chose the single quote characters as the special pair of symbols that enclose or wrap any other character literal. 

These character-enclosing symbols could have been anything other than single quotation marks. 

Bearing this in mind, consider the alternative quote (q) operator. The q operator enables you to choose from a set of possible pairs of wrapping symbols for character literals as alternatives to the single quote symbols. The options are any single-byte or multibyte character or the four brackets: (round brackets), {curly braces}, [squarebrackets], or <angle brackets>. Using the q operator, the character delimiter can effectively be changed from a single quotation mark to any other character 

The syntax of the alternative quote operator is as follows: 

q'delimiter'character literal which may include the single quotes delimiter' where delimiter can be any character or bracket. 

Alternative Quote (q) Operator 

Specify your own quotation mark delimiter. 

Select any delimiter. 

Increase readability and usability. 

SELECT department_name || q'[ Department's Manager Id: ]' 

|| manager_id 

AS "Department and Manager" 

FROM departments; 

Alternative Quote (q) Operator 

Many SQL statements use character literals in expressions or conditions. If the literal itself contains a single quotation mark, you can use the quote (q) operator and select your own quotation mark delimiter. 

You can choose any convenient delimiter, single-byte or multi byte, or any of the following character pairs: [ ], { }, ( ), or < >. 

In the example shown, the string contains a single quotation mark, which is normally interpreted as a delimiter of a character string. By using the q operator, however, brackets 

[] are used as the quotation mark delimiters. The string between the brackets delimiters is interpreted as a literal character string. 

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