Dictionary and Normalization Guidelines
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December 28, 2012
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4 / 929
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A data dictionary can be stored in files or documents, or can be stored within a database in the DBMS.
For example, a database may contain an employee table that has an emp_no column and an identification_no column. A data dictionary can explain that the emp_no column is an integer value containing the employee number assigned by the system...
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When a new employee is added to the system, a next number value is retrieved from a next number table and assigned to the new employee record. The data dictionary would also explain that the identification_no column is an alpha-numeric value that contains the employee's social security number for US residents and for non-US residents contains the employee's country code followed by their work visa number...
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