Most data collected in statistics and science is still stored in simple flat files, usually data matrices with rows identified by a case identifier (case_id), columns corresponding to attributes (variables), and numerical data types for the elements of each matrix due to coding of all attributes involved. Each row (tuple) carries the (coded) values of the attributes, besides the case_id. Due to...

Introduction Statistical databases are databases containing statistical information. Such databases are normally released by national statistical institutes but, on occasion, they can also be released by healthcare authorities (epidemiology) or by private organizations (e.g. consumer surveys). Statistical databases typically come in three formats: • Tabular data, that is, tables with counts or ...