A database is composed by one or more tables.

Creating a table in SQL is done using the CREATE TABLE command.

At creation time you need to specify the table columns names, and the type of data they are going to hold.

SQL defines several kinds of data.

The most important and the ones you’ll see more often are:

• CHAR
• TEXT
• VARCHAR
• DATE
• TIME
• DATETIME
• TIMESTAMP

Numeric types include

• TINYINT 1 byte
• INT 4 bytes
• BIGINT 8 bytes
• SMALLINT 2 bytes
• DECIMAL
• FLOAT

They all hold numbers. What changes is the size that this number can be.

A TINYINT goes goes 0 to 255. An INT from -2^31 to +2^31.

The bigger the size in bytes, the more space will be needed in storage.

This is the syntax to create a people table with 2 columns, one an integer and the other a variable length string:

CREATE TABLE people (
age INT,
name CHAR(20)
);


## One more thing! ⚠️ ✋

At the end of January I will organize the Web Development Bootcamp.

It's a 10-weeks long cohort online course where I will guide you to becoming a Web Developer.

It's not "just a course". It's a big event I organize once a year.

We'll start from zero, learn the fundamentals of Web Development, HTML CSS, JavaScript, Tailwind, Git, using the command line, VS Code, GitHub, Node.js, we'll then learn React, JSX, how to use PostgreSQL, Astro, Next.js, Prisma, deploying on Netlify/DigitalOcean/Fly/Vercel and much more!

At the end of the first 10 weeks you'll know how to create web sites and web applications and I'll unlock you the 2nd phase of the Bootcamp: you will get access to a large number of projects exclusive to the Bootcamp graduates, so you can follow my instructions to build things like private areas with authentication, clones of popular sites like Twitter YouTube Reddit, create e-commerce sites, and much much more.

Because once you got the fundamentals, you only learn by working on real, exciting projects.

To find out more, visit bootcamp.dev