Databases and SQL
Design tables and query them with SQL.
01Tables and KeysDesign tables with primary keys that uniquely identify each row.Read lesson →02Table RelationshipsLink tables with foreign keys in one-to-many relationships.Read lesson →03SELECT QueriesRetrieve exactly the data you need with SELECT, WHERE and ORDER BY.Read lesson →04Changing DataAdd, update and delete rows safely with INSERT, UPDATE and DELETE.Read lesson →