1. Rob Gleasure R.Gleasure@ucc.ie robgleasure.com
IS6126 Databases for Management Information Systems Lecture 3: SQL III – Solutions
Rob Gleasure
robgleasure.com

2. Exercise Solution
We want to create a new table in our database called Inventory with the following criteria
Three columns for Part_ID, Part_Name, and Part_of_Product
All three of these columns set to not null
The Part_ID set as primary key
The Part_of_Product set as a foreign key to Products(ProductID)
The default Part_Name is ‘Phalange’
 CREATE TABLE Inventory (
Part_ID int PRIMARY KEY,
Part_name varchar (50) NOT NULL DEFAULT 'Phalange',
Part_of_Product varchar(255) NOT NULL ,
CONSTRAINT fk FOREIGN KEY (Part_of_Product ) REFERENCES Products(ProductID) );

3. Exercise Solution
Run the following query to see what the database looks like
INSERT INTO Inventory (Part_ID,Part_of_Product) VALUES ('1', '4');
INSERT INTO Inventory (Part_ID,Part_of_Product,Part_Name) VALUES ('3', '5', 'Cogs');
We want to create an index for the Part_Name, so that this can be searched independently?
CREATE UNIQUE INDEX PtNm_index ON Inventory(Part_Name);
We want to add a column to Inventory called Cost with type varchar(20)?
ALTER TABLE Inventory ADD Cost varchar(20);
We want to create a view [Phalanges] showing where Part_ID, Part_of_Product, and Cost where the Part_Name is ‘Phalange’?
CREATE VIEW [Phalanges] AS SELECT Part_ID, Part_of_Product, Cost FROM Inventory WHERE Part_name='Phalange';