1. COMP 5531 Introduction to MySQL

2. SQL SQL is a standard language for accessing and managing databases. SQL stands for Structured Query Language.

3. What can SQL do? Retrieve data from a database. Insert records in a database. Update existing records. Delete records. Create new database. Create new tables etc.

4. SQL Components SQL has three main parts. – DDL (Data Definition Language) CREATE TABLE, DROP TABLE, ALTER TABLE – DML (Data Manipulation Language) SELECT, INSERT, UPDATE, DELETE – DCL (Data Control Language) GRANT, REVOKE

5. MySql Based on RDBMS. (Relational Database Management System) The most popular Open Source SQL. Download link – http://dev.mysql.com/downloads/

6. Manage Your Database CREATE DATABASE database_name; SHOW DATABASES; USE database_name; DROP DATABASE database_name; SHOW TABLES;

7. Create table CREATE TABLE table_name ( column_name1 data_type, column_name2 data_type, column_name3 data_type,.... );

8. Data types Kind of values it can represent

9. An example of Create Table CREATE TABLE mytable (Student_Id int, LastName varchar(255), FirstName varchar(255), GPA decimal(3,2), DOB date);

10. Managing the table DESC mytable; DROP TABLE mytable;

11. Inserting data into table INSERT INTO table_name VALUES (value1,value2,value3,...); Or INSERT INTO table_name (column1,column2,...) VALUES (value1,value2,...);

12. Example of inserting data insert into mytable values (6246893,'Krishnan','Giri',3.44,'1987-03-03');

13. Viewing data in the table SELECT column_name,column_name FROM table_name; And SELECT * FROM table_name;

14. Example of viewing data select * from mytable; select student_id, gpa from mytable;

15. View data with a WHERE clause SELECT column_name,column_name FROM table_name WHERE column_name operator value select * from mytable where student_id = 6246893;

16. Operators in the WHERE clause OperatorDescription =Equal <>Not equal >Greater than <Less than >=Greater than or equal <=Less than or equal BETWEENBetween an inclusive range LIKESearch for a pattern INTo specify multiple possible values for a column

17. Select DISTINCT data SELECT DISTINCT column_name,column_name FROM table_name; select distinct firstname from mytable;

18. SQL Constraints NOT NULL UNIQUE PRIMARY KEY FOREIGN KEY CHECK DEFAULT