1. CS1222 Using Relational Databases and SQL
3/27/2020
CS Using Relational Databases and SQL
Introduction
Huiping Guo
Department of Computer Science
California State University, Los Angeles

2. What is a database? A large, integrated collection of data Bank
Company
E-commerce
Government
University
……….
1. Introduction

3. Why use a database? Efficient data management access
Concurrent access and crash recovery
Data integrity and security
Data administration
Data independence
Reduced application development time
1. Introduction

4. Database models Physical model Logical model
3/27/2020
Database models
Physical model
How data is stored on a disk
Logical model
How data is organized
Three models
Hierarchical
Network
Relational
A set of concepts to describe the structure of a database, and certain constraints that the database should obey.
1. Introduction

5. Relational model Most popular relational DBMS
Oracle, Sybase, MySQL, SQL Server, Access
In this model, a database is a collection of tables
The tables are related to each other
1. Introduction

6. Relational Database Concepts: Table
Field
(column,
Attribute)
Table
(Relation)
Table: Titles
Record (tuple, row)
1. Introduction

7. Relational Database Concepts
Candidate Key
Also called keys
Uniquely identify a record
No two rows have the same candidate key
Maybe multiple candidate keys in a table
Primary key
Select a candidate key as the primary key
Only one primary key in a table
1. Introduction

8. Relational Database Concepts
Candidate keys
titleID, Title, UPC
Primary key
Any ONE of the candidate keys
1. Introduction

9. Data type Determine what kind of data a field can store
Common data types
Text
Numeric
Byte integer, long integer, single, double, decimal
date/time, boolean
Special
1. Introduction

10. Schema “Definition” of a database To be covered in CS4222
Names of the tables
Attributes and attribute types in each table
Constraints on each tables
Dependencies between tables
To be covered in CS4222
1. Introduction

11. Introduction to SQL Structured Query Language Open ANSI standard
Supported by most databases
Some variation in implementation
A skill that is used by many people in many environments
Programmers
Database Administrators
Managers
1. Introduction

12. What Does SQL Do? Views information from relational database
Single or Multiple Tables
Tools to Calculate and Summarize
Manipulates information in relational database
Insert Records
Update Records
Delete Records
Operates on entire recordset with single command
Defines relational database
Create Database, Tables, Primary and Foreign Keys
1. Introduction

13. SQL queries Basic format: If you select ALL attributes of a table
SELECT filed_name1, field_name2,…
FROM table_name1, tabel_name2…
[WHERE conditions]
If you select ALL attributes of a table
SELECT *
FROM table_name
[WHERE conditions]
1. Introduction

14. SQL examples List all the attributes of all titles
SELECT *
FROM Titles
List the title and upc of all titles
SELECT title, upc
List the title and upc of the titles in the ‘metal’ genre
WHERE genre = ‘metal’
1. Introduction

15. Using MySQL

16. Introduction to MySQL MySQL is a free client-server DBMS MySQL Sever
cs1.calstatela.edu
MySQL client
Graphical User Interface tool
MySQL Workbench, MYSQL client…
Command line
Connect to the server directly under the command window
SSH Secure Shell Client
1. Introduction

17. MySQL Workbench Minimum Requirements for Windows Download Workbench
Microsoft .NET Framework 4.5.2
Visual C++ Redistributable for Visual Studio 2019
Download Workbench
Install
1. Introduction

18. MySQL Workbench for MAC
Please check the following link:
1. Introduction

19. Launch MySQL workbench
1. Introduction

20. Set up a new connection 1. Introduction Name the connection
Your assigned user name
Your assigned user name
Click here to enter your password
1. Introduction

21. Double click
1. Introduction

22. 1. Introduction

23. Create tables in the Lyric database
Open lyric.sql posted on the class webpage
Copy&paste the content of the file to the query window
Run the queries
1. Introduction

24. Create tables in the Lyric database
Run the query
1. Introduction

25. 1. Introduction

26. Design the following queries:
Find all the information of sales person
Find the name and web address of all artists
Find the names of all artists who are in Canada
Find the titleIDs and the titles that are recorded in studio 1
Find the titles of all tracks on titleID 1
1. Introduction