A database course teaches the principles and practices of database design, management, and querying. It covers how to store, retrieve, and manipulate data efficiently using database management systems (DBMS).

You will typically learn SQL as the primary language for interacting with relational databases. Additionally, you may use database management tools like MySQL, PostgreSQL, Oracle, and NoSQL databases like MongoDB.

SQL (Structured Query Language) is the standard language used to communicate with relational databases. Most database courses include comprehensive training on SQL for creating, updating, querying, and deleting data.

Indexes are data structures that improve the speed of data retrieval operations on a database table. They are important for optimizing query performance, especially on large datasets.

Stored procedures are precompiled SQL statements that can be stored in a database. They improve performance and allow for better management of complex queries. Many courses include training on how to create and use stored procedures.