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How can we Classify the operations on classes This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF. Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relati
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Australian Bureau of Statistics (ABS) provides retail data for different groups and different states as well as the aggregate numbers. Table 11 " Retail Turnover, State by Industry
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
random file orgnization
Define multivalued dependency and 4NF. Ans: Multivalued Dependency - Assume R be a relation schema and let α ⊆ R and β ⊆ R. The multivalued dependency α →→β holds o
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
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