Posted by - DatabaseExpert -
30 Dec 2012 06:39:03 GMT - in - Computer Science - 133 Views
Describe the requirements that a table must meet to qualify as a relation.
In order for a table to meet the requirements of a relation, it must satisfy certain conditions. First, the rows contain data about an entity or some portion of the entity. Second, the columns contain data that represent attributes of the entity – each column must contain the same kind of data for all rows – and each column must have a unique name. Third, the cells must contain single values – no group or array values are allowed. Finally, the rows must be unique. It is worth noting that the order of the columns and the rows is insignificant.