MySQL is an open-source relational database management system. The document demonstrates how to create and manage a MySQL database called "college" including creating tables, inserting records, updating records, extracting records with conditions, and deleting tables and users. The key steps shown are: 1. The root user creates a database called "college" and a user called "test" who is given access to that database. 2. The test user logs in and creates a table called "staff_register" with fields to store staff details. Records are inserted and updated. 3. Records can be extracted using conditions and the LIKE operator. Tables and users can also be deleted.

1. Operation of MySQL
by Hideo

2. 1. About MySQL
•MySQL is relational database management
system (RDBMS).
•MySQL is Open Source (Free License).
•A database is a collection of data organized
for the purpose of "sharing and using
multiple" and "searching and processing"
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3. 2. Create Database (by root user)
$ mysql -u root -p
Enter password: # input password
mysql> create database college; # create DB
mysql> show databases;
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Database
information_schema
college
mysql
performance_schema
sys
wordpress

4. 3. Create User (by root user)
# Create a test user and give all privileges to the corresponding DB
mysql> grant all on college.* to test@localhost identified by 'test';
mysql> select user from mysql.user; # Confirm that test user was added
mysql> exit
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user
debian-sys-maint
mysql.session
mysql.sys
root
test
wordpress

5. 4. Login by working user
$ mysql -u test -p
Enter password: # input passwrd
mysql> show databases; # Confirm DB available for working users
mysql> use college; # Set the DB to use
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Database
information_schema
college

6. 5a. Create Table
mysql> create table tbl_name
(col_name1 data_type1,
col_name2 data_type2, ...);
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7. 5b. Create Table
mysql> create table staff_register(
id int(4) auto_increment primary key,
department varchar(32) not null,
section varchar(32) not null,
name varchar(32) not null,
phone int(8),
email varchar(32)
);
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8. 6. Show Table
# Confirm to create table
mysql> show tables;
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Tables in college
staff_register

9. 7. Description Table
mysql> desc staff_register; # Show column
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Field Type Null Key Default Extra
id int(4) NO PRI NULL auto_increment
department varchar(32) NO NULL
section varchar(32) NO NULL
name varchar(32) NO NULL
phone int(8) YES NULL
email varchar(32) YES NULL

10. 8. Add Record
mysql> insert into staff_register (id, department, section,
name, phone, email) values (1, 'Technology', 'Applied Science',
'John Brawn', 74111111, 'aaa@gmail.com');
# The description of the column can be omitted only when
specifying values for all columns
mysql> insert into staff_register values (1, 'Technology',
'Applied Science', 'John Brawn', 74111111, 'aaa@gmail.com');
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11. 9. Update Record
mysql> select * from staff_register; # Comfirm add record
# Changed John Brawn's name to Jack Brawn
mysql> update staff_register set name = 'Jack Brawn' where name =
'John Brawn';
mysql> select * from staff_register; # Comfirm updated record
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id department section name phone email
1 Technology Applied Science John Brawn 74111111 aaa@gmail.com
id department section name phone email
1 Technology Applied Science Jack Brawn 74111111 aaa@gmail.com

12. 10. Add some record
mysql> insert into staff_register (department, section, name, phone, email)
values ('Technology', 'ICT', 'Jacob', 74111112, 'bbb@gmail.com');
mysql> insert into staff_register (department, section, name, phone) values
('Technology', 'ICT Support', 'Jackson', 74111113);
mysql> insert into staff_register (department, section, name, email) values
('Administration', 'Administration', 'Noah', 'ddd@gmail.com');
mysql> insert into staff_register (department, section, name) values
('Administration', 'Finance', 'Lucas');
mysql> insert into staff_register (department, section, name) values
('Administration', 'Learning Resouces Centre', 'Sophia');
mysql> insert into staff_register (department, section, name, email) values
('Administration', 'Maintenance', 'Chloe', 'fff@yahoo.com');
mysql> insert into staff_register (department, section, name, email) values
('Administration', 'Supplies & Contracts', 'George', 'ggg@yahoo.com');
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13. 11. Comfirm Record
mysql> select * from staff_register;
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id department section name phone email
1 Technology Applied Science Jack Brawn 74111111 aaa@gmail.com
2 Technology ICT Jacob 74111112 bbb@gmail.com
3 Technology ICT Support Jackson 74111113 NULL
4 Administration Administration Noah NULL ddd@gmail.com
5 Administration Finance Lucas NULL NULL
6 Administration Learning Resouces Centre Sophia NULL NULL
7 Administration Maintenance Chloe NULL fff@yahoo.com
8 Administration Supplies & Contracts George NULL ggg@yahoo.com

14. 12. Exercise
1. add a record containing your name
to staff_register table.
2. Comfirm added record
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15. 13. Delete Record
mysql> delete from staff_register where section = 'Finance';
mysql> select * from staff_register; # comfirm deleted record
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id department section name phone email
1 Technology Applied Science Jack Brawn 74111111 aaa@gmail.com
2 Technology ICT Jacob 74111112 bbb@gmail.com
3 Technology ICT Support Jackson 74111113 NULL
4 Administration Administration Noah NULL ddd@gmail.com
6 Administration Learning Resouces Centre Sophia NULL NULL
7 Administration Maintenance Chloe NULL fff@yahoo.com
8 Administration Supplies & Contracts George NULL ggg@yahoo.com

16. 14. Extraction Conditions
# You can specify the extraction condition in the where clause.
mysql> select * from staff_register where department = "Administration";
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id department section name phone email
4 Administration Administration Noah NULL ddd@gmail.com
6 Administration Learning Resouces Centre Sophia NULL NULL
7 Administration Maintenance Chloe NULL fff@yahoo.com
8 Administration Supplies & Contracts George NULL ggg@yahoo.com

17. 15. LIKE Operator
# You can also use the LIKE operator and the wildcard character "%"
to specify a partial match condition for a string.
mysql> select * from staff_register where email like '%yahoo.com';
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id department section name phone email
7 Administration Maintenance Chloe NULL fff@yahoo.com
8 Administration Supplies & Contracts George NULL ggg@yahoo.com

18. 16. Delete Table
mysql> truncate table staff_register; # Delete data in staff_register table
mysql> select * from staff_register; # Comfirm deleted record
mysql> drop table staff_register; # Delete staff_register table
mysql> show tables; # Comfirm deleted table
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19. 17. Delete User (by root user)
$ mysql -u root -p
Enter password: # input password
# deprive access authority to all databases from the test user
mysql> revoke all privileges on *.* from test@localhost;
mysql> drop user test@localhost; # delete test user
mysql> select user from mysql.user; # comfirm deleted test user
mysql> flush privileges; # Reflect test user deletion on MySQL server
mysql> exit
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