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Introduction to MySQL
MySQL Overview
by
Ray Williams
CS 320/565 Marymount University
MySQL Overview
¢
MySQl is an Open Source Relational Database
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MySQL was created by MySQL AB in Sweden
by:
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David Axmark
"
Allan Larsson
"
Michael "Monty" Wiedenus
The "Official" Site is http://www.mysql.com
¢
"
C
o
Note there is a current controversy where Progress Software
and NuSphere Corporation have set up another site
http://www.mysql.org in violation of the MySQL Copyright
MySQL Platforms
MySQL is available on a variety of platforms
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Linux
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FreedBSD and NetBSD
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Solaris
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SCO Unix
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Win32
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WindowsNT
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OS/2
MySQL Features
¢ Multithreaded
¢ ANSI SQL-92 Compliant
¢ Online Help
¢ Portability
¢ Many Application Programming Interfaces APIs
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Perl
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TCL
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Python
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Java (JDBC
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ODBC
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C++
MySQL Architecture
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As a database MySQL is a series of
structured files that are organized in a highly
efficient manner.
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By default the mysql database is created with
the host, user and database privileges.
Table
Table
Row
Column
Table
MySQL Files and Directories
¢ Directories
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Support-files - files to aid in installing and configuring
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Bin - MySQL commands
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Data - Database data files
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Include - All C header files
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Tests - Perl scripts to test MySQL
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Lib - Library files used in C++ API
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Scripts - Install scripts for MySQL
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Share - Error logs and messages
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Mysql-bench - Home of crashMe tool
Files
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ChageLog, INSTALL-BINARY, PUBLIC, README, manual.*
(txt, htm)
Starting & Stopping MySQL
bin/safe_mysqld &
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Starts the MySQL daemon (server) under Unix/Linux
mysqld.exe
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Starts the MySQL server under Windows
bin/mysqladmin -p ping
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Prompt for password (-p) and verify server daemon is
running.
bin/mysqladmin -p shutdown
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Prompt for password and shutdown server
Using MySQl
¢ To get into the command line:
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bin/mysql -p
¢ To view installed databases
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SHOW databases;
¢ To select a database
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USE mysql;
¢ To view tables
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SHOW TABLES FROM mysql;
¢ To view columns in a table
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SHOW COLUMNS FROM user;
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DESC user;
or
Using MySQL (cont.)
¢ To create a new database
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CREATE DATABASE sample_db;
or
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bin/mysqladmin -p CREATE sample_db;
¢ To delete a database
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DROP DATABASE sample_db;
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bin/mysqladmin -p DROP sample_db;
¢ To add a new user
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INSERT INTO user VALUES('localhost',
'new_user',password('password'), 'Y', 'Y', 'Y', 'Y', 'Y',
'Y', 'Y', 'Y', 'Y', 'Y','Y','Y','Y','Y');
Using MySQl (cont.)
¢ INSERT INTO user VALUES('localhost',
'new_user',password('password'), 'Y', 'Y', 'Y', 'Y', 'Y',
'Y', 'Y', 'Y', 'Y', 'Y','Y','Y','Y','Y');
A Quick Run Thru MySQL
¢ CREATE DATABASE temp;
¢ USE DATABASE temp;
¢ CREATE TABLE test_table (Test_ID INT NOT NULL
PRIMARY KEY AUTO_INCREMENT, Test_Name
VARCHAR(30), Test_Date DATETIME, Test_Giver
VARCHAR(30));
¢ INSERT INTO test_table(Test_ID, Test_Name, Test_Date,
Test_Giver) VALUES (NULL,'Test','2001-10-02','Beryl');
¢ SELECT * FROM test_table;