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What is Derived and stored Attribute?
Derived and Stored Attribute - In a few cases, two or more attribute values are associated, for example, Age and BirthDate attributes of a person. For particular person entity, the value of Age can be denoted from the current date and the value of in which person's BirthDate. Therefore, the attribute Age is known as derived attribute and the attribute BirthDate is known as stored attribute.
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
Define the categories of SQL Statements? 1) Statements that don't return a result set. This statement class includes INSERT, DELETE, and UPDATE. 2)Statements that return
What is RDBMS? Relational Data Base Management Systems (RDBMS) are database management systems that maintain data records and indices in tables. Relationships may be formed and
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
What is difference between primary index and secondary index? Primary Index a) It is an ordered file whose records are of fixed length along with two fields. b) Only base
explain cascading rollback
What is Cardinality Ratio? Cardinality Ratios - The cardinality ratios for relationship kinds specifies the maximum number of relationship instances in which an entity can pa
State the Steps of Object Design Object design is a very iterative process in which various classes, relationships among objects are added when you move from one level to
Set Difference If R1 and R2 are two union compatible relations or relations then result of R3 =R1- R2 is the relation that have only those tuples that are in R1 but not in R2.
What is the full form of DDL? DDL is stand for Data Definition Language.
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