Slide 1 Chapter 2 Introduction to Structured Query Language (SQL)

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Chapter 2Chapter 2

Introduction to Introduction to Structured Query Structured Query Language (SQL)Language (SQL)

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ContentsContents

A. Storage Management ProblemB. Solution

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Due to manage the product in storage, Algo company needs a database which enables accessibility efficiently.

In their system, product has following information: Product ID Product name Product type Quantity which is currently available in storage Product Price Manufacturer

Each manufacturer has its ID, name and address.

Each manufacturer produces one or more products.

For example data of some products, prefer to next slide.

A. Storage Management A. Storage Management ProblemProblem

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Example 1: Product ID: PRO1 Product name: 512 MB DDRAM Product type: RAM Quantity: 10 Price: 30 $ Manufacturer ID: YUK Manufacturer name: Yuki Manufacturer address: Tokyo

Example 2: Product ID: PRO2 Product name: 1 GB

DDRAM Product type: RAM Quantity: 10 Price: 40 $ Manufacturer ID: YUK Manufacturer name:

Yuki Manufacturer address:

Tokyo

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• Display information of product name and quantity of all products.

• Display all information of all products. • Display product type in product table. However,

this result must be unique.• Display all information of all products. Present

result sorted by product name in descending order and then quantity in ascending order.

• Suppose there are some products which have type is RAM. Display information of all products which have product type is RAM.

• Suppose there are some products which have type is RAM. Display information of all products which have product type is RAM and quantity greater than 20.

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• Suppose there are some products which have type is RAM. Display information of all products which have product type is RAM or has quantity greater than 5.

• Suppose there are some products have name is “BOXDG” and 256MB DDRAM. Display information of all products which its names must contain in following set: [“BOXDG”, “256MB DDRAM”].

• Suppose there are some products have name is “BOXDG” and 256MB DDRAM. Display information of product which its names must NOT contain in following set: [“BOXDG”,“256MB DDRAM”].

• Display information of all products. Price of these product must be greater than or equals 30 and less than or equals 100.

• Suppose there are some products have name start with ‘GA’. Display information of product which its names must be started with ‘GA’ letters.

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• Suppose there are some products has name includes “G3” letters Display information of product. These product names must include ‘G3’ letters.

• Display number of all products in storage.• Display sum of quantity of all products.• Display Average of price of all products.• Display Maximum price of all products.• Display Minimum price of all products.• Display value of each product in storage. The

function of value is:

VALUE = quantity * price

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• Display information of product name and product type. The format of this result is:

“PRODUCT_NAME” is "PRODUCT_TYPE“• There are currently has two TYPE of product

includes: Main board and RAM. Display the sum of quantity for each TYPE of product.

• Display product type which has Sum of quantity greater than 30.

• Suppose there are some products which were produced by Shiro manufacturer. Display name and manufacturer name of the product which its manufacturer is Shiro.

• Suppose there are some products which were produced by Shiro manufacturer and Sanno manufacturer. Display name of product which its manufacturer is Yuki and Sanno.

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B. SolutionB. Solution

1. Logical Design2. Physical Design3. Creating DB and populating data into the

DB4. SQL Statement Solutions

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1. Logical Design1. Logical Design

Following the problem description and data examples, we have logical design of Product.

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2. Physical Design2. Physical Design

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Creating DB and populating Creating DB and populating data into the DBdata into the DB

• This is an exercise for you. • The following are sample data.

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4. SQL Statement Solutions4. SQL Statement Solutions

4.1. Display PRODUCT NAME and QUANTITY.4.2. Display all column in PRODUCT table.4.3. Display unique PRODUCT TYPE.4.4. Display PRODUCT NAME in descending order, QUANTITY in

ascending order.4.5. Display all products are RAM.4.6. Display products are RAM and have quantity greater than

20.4.7. Display products are RAM or have quantity greater than 5.4.8. Display product has name is in set [“BOXDG”, “256MB

DDRAM”].4.9. Display product has name is NOT in set [“BOXDG”, “256MB

DDRAM”].4.10. Display product has 30 <= price <=100.4.11. Display product has name starts with “GA” letter.4.12. Display product has name includes “G3” letter.

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4. SQL Statement Solutions4. SQL Statement Solutions

4.13. Display number of rows in PRODUCT table.4.14. Display SUM of quantity.4.15. Display AVERAGE of price.4.16. Display MAXIMUM of price.4.17. Display MINIMUM of price .4.18. Display Value of each product.4.19. Display PRODUCT NAME, PRODUCT TYPE in format.4.20. Display SUM of quantity of each product type.4.21. Display SUM of quantity of each product type and Sum is

greater than 30.4.22. Display product of Shiro manufacturer.4.23. Display product of Yuki and Sanno manufacturers.

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4.1. Display PRODUCT NAME and 4.1. Display PRODUCT NAME and QUANTITYQUANTITY

SELECT Name, QuantityFROM PRODUCTS;

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4.2. Display all column in PRODUCT 4.2. Display all column in PRODUCT tabletable

Selecting All Columns: The Asterisk (*) Keyword

SELECT * FROM PRODUCTS;

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4.3. Display unique PRODUCT TYPE4.3. Display unique PRODUCT TYPE

SELECT DISTINCT Type FROM PRODUCTS;

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4.4. Display PRODUCT NAME in 4.4. Display PRODUCT NAME in descending order, QUANTITY in descending order, QUANTITY in ascending orderascending order

Sort Order: Ascending and DescendingSELECT * FROM PRODUCTSORDER BY Name DESC, Quantity ASC;

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4.5. Display all products are RAM4.5. Display all products are RAM

SELECT * FROM PRODUCTS WHERE Type = 'RAM‘;

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4.6. Display products are RAM 4.6. Display products are RAM andand have quantity greater than 20have quantity greater than 20

SELECT * FROM PRODUCTSWHERE Type = 'RAM‘ AND Quantity > 20;

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4.7. Display products are RAM 4.7. Display products are RAM oror have quantity greater than 5have quantity greater than 5

SELECT * FROM PRODUCTS WHERE Type = 'RAM‘ OR Quantity > 5;

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4.8. Display product has name is in 4.8. Display product has name is in set [“BOXDG”, “256MB DDRAM”]set [“BOXDG”, “256MB DDRAM”]

SELECT *FROM PRODUCTSWHERE Name IN ('BOXDG‘, '256MB DDRAM');

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4.9. Display product has name is 4.9. Display product has name is NOT in set [“BOXDG”, “256MB NOT in set [“BOXDG”, “256MB DDRAM”]DDRAM”]

SELECT *FROM PRODUCTSWHERE Name NOT IN ('BOXDG‘,'256MB

DDRAM');

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4.10. Display product has 30 <= 4.10. Display product has 30 <= price <=100price <=100

Solution 1: SELECT * FROM PRODUCTSWHERE Price BETWEEN 30 AND 100;

Solution 2: SELECT * FROM PRODUCTSWHERE Price >= 30 AND Price <= 100;

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4.11. Display product has name 4.11. Display product has name starts with “GA” letterstarts with “GA” letter

SELECT *FROM PRODUCTSWHERE Name LIKE 'GA%';

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4.12. Display product has name 4.12. Display product has name includes “G3” letterincludes “G3” letter

SELECT *FROM PRODUCTSWHERE Name LIKE '%G3%';

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4.13. Display number of rows in 4.13. Display number of rows in PRODUCT tablePRODUCT table

SELECT COUNT(*) as numRows FROM PRODUCTS;

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4.14. Display SUM of quantity4.14. Display SUM of quantity

SELECT SUM(Quantity) as sumQuantity FROM PRODUCTS;

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4.15. Display AVERAGE of price4.15. Display AVERAGE of price

SELECT AVG(Price) as averagePriceFROM PRODUCTS;

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4.16. Display MAXIMUM of price4.16. Display MAXIMUM of price

SELECT MAX(Price) as maxPriceFROM PRODUCTS;

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4.17. Display MINIMUM of price4.17. Display MINIMUM of price

SELECT MIN(Price) as minPriceFROM PRODUCTS;

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4.18. Display Value of each product4.18. Display Value of each product

Note: VALUE = quantity * priceSELECT Name, Quantity * Price as ValueFROM PRODUCTS;

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4.19. Display PRODUCT NAME, 4.19. Display PRODUCT NAME, PRODUCT TYPE in formatPRODUCT TYPE in format

SELECT Name + ' is ' + Type as detailNameFROM PRODUCTS;

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4.20. Display SUM of quantity of 4.20. Display SUM of quantity of each PRODUCT TYPEeach PRODUCT TYPE

SELECT Type, SUM(Quantity) as totalQuantityFROM PRODUCTSGROUP BY Type;

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4.21. Display SUM of quantity of 4.21. Display SUM of quantity of each PRODUCT TYPE and Sum is each PRODUCT TYPE and Sum is greater than 30greater than 30

SELECT Type, SUM(Quantity) as totalQuantity

FROM PRODUCTS GROUP BY TypeHAVING SUM(Quantity) > 30;

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4.22. Display product of Shiro 4.22. Display product of Shiro manufacturermanufacturer

SELECT Products.Name as ProductName, Manufacturers.Name as

ManufacturerNameFROM PRODUCTS, MANUFACTURERSWHERE Products.Man_ID =

Manufacturers.Man_ID AND Manufacturers.Name = 'Shiro‘;

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4.23. Display product of Yuki and 4.23. Display product of Yuki and Sanno manufacturersSanno manufacturers

Solution 1:

SELECT Name

FROM PRODUCTS

WHERE Man_ID IN (SELECT Man_ID

FROM MANUFACTURERS

WHERE Name IN ('Sanno', 'Yuki'));

Solution 2: SELECT P.Name FROM PRODUCTS P, MANUFACTURERS M WHERE P.Man_ID = M.Man_ID AND M.Name IN

('Sanno', 'Yuki');

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References

Database Processing – Chapter 2Fundamentals, Design and Implementation

David M. Kroenke

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