Which of the following are not general characteristics of the relation?
Correct answer: B. The order column is significant
- A. Each row is unique
- B. The order column is significant
- C. The order of rows is insignificant
- D. Columns are all elemental or atomic
Explanation
A table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. A table has a specified number of columns, but can have any number of rows.
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Databases cover tables, records, fields, keys and relationships, together with database management systems and relational database design. The subject includes primary and foreign keys, normalization, SQL commands such as SELECT, INSERT, UPDATE and DELETE, queries, forms and reports, while distinguishing a database from a spreadsheet used for simple tabular data.
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