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Describe the algorithm for updating indices for a single level index when a record is
(i) Inserted (ii) deleted
What will be the modification if there are multilevel indices?
Ans: Inserted: The time it acquires to insert a new data item. This value involves the time it takes to find out the correct place to insert the new data item, also the time it takes to update the index structure.
Deleted: The time it receives to delete a data item. This value involves the time it takes to find the item to be deleted, also the time it takes to update the index structure.
Describe the types of Inheritance 1. Single inheritance 2. Multiple inheritance 3. Hierarchical inheritance 4. Multilevel inheritance
what do you mean by consistency in rdbms?
Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );
what is attribute is attribute inheritance in dbms?
One-to-one relationship: For every 1:1 relationship type R in the ER diagram including two entities E1 and E2 we take one of entities (say E1) preferably with total participatio
Three Level Architecture of DBMS or Logical DBMS Architecture The logical architecture defines how data in the database is perceived by users. It is not deals with how the da
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
The External or View Level The external or view level is the highest level of abstraction of database. It gives a window on the conceptual view, which permits the user to see
I need help for my Uni assignments
the of super market system done in database
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