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Explain Instance and schemas?
Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database at a particular moment in time is known as Instances and the whole design of database is known as schemas.
Define in which normalisation form if an attribute of a composite key is dependent on an attribute of other composite key. Ans: 3NF A relation is in 3 NF if an attribute of
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
Concurrency issues Data integrity: Threads accessing same object need to be synchronized, such as: banking account. Deadlock: One or more threads in system are perman
Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. A long-standing international treaty am
What are the DBMS languages? Explain. Ans: a) Data Definition Languages (DDL): It is employed to specify database schema for example CREATE DROP statements etc. b) Dat
What is the meaning of Data Independence ?
online eductional management system ke diagram
explain in detail about time stamp orderting/
What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage
What are the different kinds of database end users? Discuss the major activities of each? End-Users - End-users are the people whose jobs need access to the database for que
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