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Write short notes on relational model
The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an example of a record based model.
Explain Network Model in DBMS? Network Model - It was formalised within the late year of 1960s through the Database Task Group of the Conference on Data System Language (DBTG
properties of derirable decomposition
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Although how will the system recover The selection of REDO or UNDO for a transaction for the recovery is completed on the basis of the state of the transactions. This state is
The scenario You have been approached to design and implement a prototype of a distributed information system for a national car part retail outlet chain. The company comprises
What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
what is cascading rollback
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Describe the definition of a transaction in SQL Ans: The SQL transaction starts implicitly. Transactions are finished by either Commit work that commits the transaction and st
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