SQL is a language used to manage data in relational database management systems. It allows users to retrieve, insert, modify and remove data from databases. The document provides steps on how to create a database called "Student" and a table called "Student_record" using PhpMyAdmin. It also discusses the importance of setting a primary key to uniquely identify each record in a table and shows the syntax to alter an existing table to add a primary key.

1. What is SQL?

2. - It stands for Structured Query
Language
- Designed for managing data in
Relational Database Management
System (RDBMS)
- A language that can retrieve, insert,
modify and remove data in a
database

3. Since we now know what
Since we now know what
is SQL, why don’t we try
is SQL, why don’t we try
creating aadatabase and aa
creating database and
table!
table!

4. We will use an open source
(free) program called
PhpMyAdmin to create and
manage a MySQL database.

6. Type localhost/phpmyadmin/ in the browser
*note: we will need to start our Xampp server
package in order to access phpmyadmin

7. The syntax in creating a database is :
CREATE DATABASE database_name
*note: underscore should be used in
joining two names

8. For example, we decided to name our database
For example, we decided to name our database
“Student”
“Student”

9. We now have our Student
We now have our Student
database 
database 

11. A table is the part of our new database that actually stores data.
We create a table by selecting the database that we created from
the drop box list of databases.

12. The syntax in creating a table is:
CREATE TABLE table_name

13. Example!

14. Table Student_record is now
Table Student_record is now
added to our database.
added to our database.

15. Primary Key
must contain
unique values
identifies cannot
each record in contain NULL
a database values
table

16. We have learned what is the
We have learned what is the
importance of Primary Key
importance of Primary Key
now in our data, we can notice that
now in our data, we can notice that
Student_Id serves as aaunique value
Student_Id serves as unique value
that identifies our database,
that identifies our database,
Student..
Student..

17. But the problem is, we
have created the table
already

18. We must use the syntax:
In order to create ALTER TABLE table_name
a PRIMARY KEY ADD PRIMARY KEY (data_column)

19. EXAMPLE!

20. Now we’re ready to import
data into our database.
Which to be
continued on the
next entry 