Introduction to SQL
Learn about SQL and how it’s used to manipulate and access databases.
We'll cover the following...
Overview of SQL
SQL (Structured Query Language) is a language used to manage data in relational database systems. To be good at working with SQL, we should have a proper understanding of the kind of relationships that exist between the entities. This helps us write more efficient, maintainable, and scalable code.
These relationships can be:
- one-to-many
- many-to-many
- one-to-one
- many-to-one
SQL is one of the most ...