An Introduction to Database Systems |
Common terms and phrases
algorithm application program assigned ASSIGNED_TO attribute names B-tree block BOOK_COPY bucket bytes candidate key cartesian product CLIENT Comp Sci Computer concurrent Consider contains data manipulation language data model data-item database system DBMS DBMSs deadlock decomposition defined deleted domain calculus DUTY_ALLOCATION Empl_No employee numbers entity set entry Example exists expression foreign key functional dependencies given HEAPSORT hierarchical implemented index-sequential insertion integrity join key value leaf nodes lock logical manager member record modified multivalued dependencies normal form operations Pay Rate physical pointers predicate primary key projection query R₁ Read(A record occurrence record type relation scheme relational algebra relational calculus relational database relationship represented result relation retrieve serializable set of attributes set type shown in Figure Smith specified storage stored structure STUDENT subset T₁ third normal form timestamp transaction tree tuple calculus tuple variable update Write(A