SQL Tutorial – 03 – Create – Database, Table, Index

SQL Tutorial – 03 – Create – Database, Table, Index

The various SQL statements can be grouped into several subset languages. The first of which we’ll look at is the Data Definition Language (DDL), which allows us to add, alter, and delete databases, tables, and indexes. First we’ll create a database called mydatabase. When we execute a statement such as this the database system won’t… Read more SQL Tutorial – 03 – Create – Database, Table, Index

UHCL 23 Graduate Database Course – Minimal Covers Example

UHCL 23 Graduate Database Course – Minimal Covers Example

Let’s take a look at example of how you would actually find a minimal cover. Here, we have a relation R with attributes A,B,C,D and E. And a set of functional dependencies, where A functionally determines D, BC functionally determines AD, C functionally determines B, E functionally determines A, and E functionally determines D. Now,… Read more UHCL 23 Graduate Database Course – Minimal Covers Example