An SQL schema is a blueprint of a database that defines the tables, their fields, and the relationships between them. In other words, it's a structure that represents the database's organization. Creating an SQL schema can be done in one of two ways: by using a graphical tool or by writing code. If you're using a graphical tool, you'll first need to create a new database. Once the database has been created, you can then add tables and fields to it. If you're writing code, you'll need to use the CREATE DATABASE statement. Once the database has been created, you can then start adding data to it. To do this, you'll use the INSERT INTO statement. This statement will allow you to add data to specific columns in a table.