Attribute types in databases specify the kind of data that can be stored in a column. Examples include integers for whole numbers, decimals for numbers with decimal points, character strings for alphanumeric data, date/time for temporal information, boolean for true/false values, BLOB for binary data, and ENUM for predefined value sets. They ensure data consistency and facilitate effective storage and retrieval.

Simple attributes.

Composite attributes.

Single-valued attributes.

Multivalued attributes and

Derived attributes.

There are three different kinds of qualities, as follows:

Flexible characteristics
Domain-based characteristics
File properties