Tuple Relational Calculus (TRC) in DBMS Difference Between Row Oriented and Column Oriented Data Stores in DBMS Join Operation Vs Nested Query in DBMS Equivalence of Functional Dependencies in DBMS Timestamp Ordering Protocol | DBMS Precedence Graph | DBMS ...
What are Armstrong's Axioms in Functional Dependency in DBMS? Armstrong axiomsare a complete set of inference rules or axioms, introduced and developed byWilliam W. Armstrongin 1974. The inference rules are sound which is used to test logical inferences of functional dependencies. The axiom which...
dbms trigger: A piece of code linked to a databasetableorcolumn, to be activated when a specified action takes place, such as updating thecolumn – stored procedure: Program code stored in adatabase management systemto control the updating and retrieval of data – database management system: ...
{b} & {b} -> {c}, when only the {a,c} columns are selected in the projection, we need to maintain the closure and transitive properties of this functional dependency graph, generating the remaining {a} -> {c} functional dependencies for the rest FD graph when column b is projected ...