Every table contains a field known as an entity (or primary) key, which identifies the rows within that table. Without some connection between tables in a database, you may as well be working with disparate spreadsheet files rather than a database system.Īs we covered in our short overview of databases, databases are collections of tables, and those tables have fields (also known as columns). Relationships are meaningful associations between tables that contain related information - they’re what make databases useful.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |