An attribute is a named field of a tuple in a relation (or table). An attribute’s domain is a (possibly infinite) set of atomic values such as, for example, the set of integer number values or the set of real number values.
In relational data models, a database is viewed as a collection of relations, also commonly referred to as tables. A table or relation is itself a collection of tuples (or records). In fact, each table is a collection of tuples that are similarly shaped. By this, we mean that a tuple has a fixed number of named fields (also known as attributes).
Describe and explain the structure and components of a relational data model and a relational database (level 1 and 2). Describe and explain what a Database Management System (DBMS) is and how it links to a GIS.
Explain the basic concepts of data retrieval (attribute and spatial queries) and formulate queries to make a selection on attributes and geospatial data from a spatial database.