Creating Tables

Explore how to create relational database tables by defining columns with appropriate data types and setting primary keys. This lesson guides you through using the SQL CREATE TABLE and DESCRIBE commands to build and examine tables effectively, ensuring data integrity and proper structure.

We'll cover the following...

Relational database
- Data types
- Primary key
The CREATE TABLE statement
The DESCRIBE statement

Relational database

When a table is organized in a manner where each row can be distinctly identified, and every cell in the table contains a single, indivisible value, the table is termed a relation. A collection of such tables forms a relational database.

Data types

Each column in a table is associated with a specific data type, which defines the kind of data that can be stored in that column. It helps the database system understand how to store, retrieve, and manipulate the data. Here’s a brief overview of some common data types:

INTEGER or INT: The INT data type is ...

1.Introduction to SQL

2.SQL SELECT

3.SQL Queries: SELECT, WHERE, AND, OR, NOT, and Strings

4.SQL ORDER BY, Aggregate functions, and GROUP BY

5.SQL CREATE, DESCRIBE, INSERT INTO, UPDATE and DELETE Tables

6.SQL Alter Table and Aliases

7.Data Redundancy

8.SQL Joins and Subqueries

9.Wrap Up

Creating Tables

Relational database

Data types