Difference between tuple and domain oriented calculus
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Domain relational calculus
It selects the attributes instead of a whole tuple,
List of attributes is selected according to the condition given.
Employee’s name and Id in department 2
Tuple relational calculus
It selects tuple in a relationship.
It uses range of values and certain attributes values to select tuple.
The employee in department 2
The variable(t) used, called tuple variable.
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