Domain Relational Calculus uses domain variables that take on values from an attributes domain, rather than for an entire tuple. Formal DefinitionAn expression in the domain relational calculus is of the form :{<x1,...
Domain Relational Calculus
Tuple Relational Calculus
The tuple relational algebra is a nonprocedural query language. It describes the desired information without giving a specific procedure or obtaining that information.A query in the tuple relational calculus is expressed...
Distributed Transaction
A distributed transaction is a set of operations on data that is performed across two or more data repositories (especially databases). It is typically coordinated across separate nodes connected by a network, but may also...
Modification of the Database in Relational Algebra
Different operations that modify the contents of the database areDeleteInsertUpdateWe express database modification by using the assignment operation.DeletionThe deletion operation removes the selected tuples from the...
Union, Intersection and Difference Cartesian Product and Additional Operations (Natural Join, Division, Assignment, Generalized Projection, Aggregate Functions, Outer Join ) in Relational Algebra
The Union, Intersection and Difference operations requires following condition The two relation/table must contain the same number of columns Each column of the first relation/table must be either the same data type as...
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