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 | Sams Teach Yourself SQL in 24 Hours, Third Edition
By Ronald R. Plew, Ryan K. Stephens
| | Table of Contents | | | | Appendix C. Answers to Quizzes and Exercises |
Hour 8, "Using Operators to Categorize Data" Quiz Answers | 1: | True or false: Both conditions when using the OR operator must be TRUE. | | A1: | False. Only one of the conditions must be TRUE. | | 2: | True or false: All specified values must match when using the IN operator. | | A2: | False. Only one of the values must match. | | 3: | True or false: The AND operator can be used in the SELECT and the WHERE clauses. | | A3: | False. The AND can only be used in the WHERE clause. | | 4: | What, if anything, is wrong with the following SELECT statements? -
SELECT SALARY FROM EMPLOYEE_PAY_TBL WHERE SALARY BETWEEN 20000, 30000 -
SELECT SALARY + DATE_HIRE FROM EMPLOYEE_PAY_TBL -
SELECT SALARY, BONUS FROM EMPLOYEE_PAY_TBL WHERE DATE_HIRE BETWEEN 1999-09-22 AND 1999-11-23 AND POSITION = 'SALES' OR POSITION = 'MARKETING' AND EMPLOYEE_ID LIKE '%55% | | A4: | -
SELECT SALARY FROM EMPLOYEE_PAY_TBL WHERE SALARY BETWEEN 20000, 30000; The AND is missing between 20000, 30000. The correct syntax is SELECT SALARY FROM EMPLOYEE_PAY_TBL WHERE SALARY BETWEEN 20000 AND 30000; -
SELECT SALARY + DATE_HIRE FROM EMPLOYEE_PAY_TBL; The DATE_HIRE column is a DATE data type and is in the incorrect format for arithmetic functions. -
SELECT SALARY, BONUS FROM EMPLOYEE_PAY_TBL WHERE DATE_HIRE BETWEEN 1999-09-22 AND 1999-11-23 AND POSITION = 'SALES' OR POSITION = 'MARKETING' AND EMPLOYEE_ID LIKE '%55%'; The syntax is correct. | Exercise Answers | 1: | Using the following CUSTOMER_TBL: DESCRIBE CUSTOMER_TBL; Name Null? Type -------------------------------- -------- ------------ CUST_ID NOT NULL VARCHAR (10) CUST_NAME NOT NULL VARCHAR (30) CUST_ADDRESS NOT NULL VARCHAR (20) CUST_CITY NOT NULL VARCHAR (12) CUST_STATE NOT NULL VARCHAR(2) CUST_ZIP NOT NULL VARCHAR(5) CUST_PHONE VARCHAR (10) CUST_FAX VARCHAR(10) Write a SELECT statement that returns customer IDs and customer names (alpha order) for customers who live in Indiana, Ohio, Michigan, and Illinois, and whose names begin with the letters A or B. | | A1: | SELECT CUST_ID, CUST_NAME, CUST_STATE FROM CUSTOMER_TBL WHERE CUST_STATE IN ('IN', 'OH', 'MI', 'IL') AND CUST_NAME LIKE 'A%' OR CUST_NAME LIKE 'B%' ORDER BY CUST_NAME; | | 2: | Using the following PRODUCTS_TBL: DESCRIBE PRODUCTS_TBL Name Null? Type ------------------------------- --------------------- PROD_ID NOT NULL VARCHAR (10) PROD_DESC NOT NULL VARCHAR (25) COST NOT NULL DECIMAL(6,2) Write a SELECT statement that returns the product ID, PROD_DESC, and the product cost. Limit the product cost to range from $1.00 and $12.50. | | A2: | SELECT * FROM PRODUCTS_TBL WHERE COST BETWEEN 1.00 AND 12.50; | | 3: | Assuming that you used the BETWEEN operator in exercise 2 above, rewrite your SQL statement to achieve the same results using different operators. If you did not use the BETWEEN operator, then do so now. | | A3: | SELECT * FROM PRODUCTS_TBL WHERE COST >= 1.00 AND COST <= 12.50; SELECT * FROM PRODUCTS_TBL WHERE COST BETWEEN 1.00 AND 12.50; | | 4: | Write a SELECT statement that returns products that are either less than 1.00 or greater than 12.50. There are two ways to achieve the same results. | | A4: | SELECT * FROM PRODUCTS_TBL WHERE COST < 1.00 AND COST > 12.50; SELECT * FROM PRODUCTS_TBL WHERE COST NOT BETWEEN 1.00 AND 12.50; Also keep in mind that BETWEEN is inclusive of the upper and lower values, whereas NOT BETWEEN is not inclusive. | | 5: | Write a SELECT statement that returns the following information from PRODUCTS_TBL: product description, product cost, and 5% sales tax for each product. List the products in order from most to least expensive. | | A5: | SELECT PROD_DESC, COST, COST * .05 FROM PRODUCTS_TBL ORDER BY COST DESC; | | 6: | Write a SELECT statement that returns the following information from PRODUCTS_TBL: product description, product cost, and 5% sales tax for each product, and total cost with sales tax. List the products in order from most to least expensive. There are two ways to achieve the same results. Try both. | | A6: | SELECT PROD_DESC, COST, COST * .05, COST + (COST * .O5) FROM PRODUCTS_TBL ORDER BY COST DESC; SELECT PROD_DESC, COST, COST * .05, COST * 1.O5) FROM PRODUCTS_TBL ORDER BY COST DESC; | |
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