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List the set operations of SQL?
1) Union
2) Intersect operation
3) The except operation
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
Explain the Deferred Update The deferred update methods do not physically update the database on disk till after a transaction reaches its commit point; after that the updates
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
Timestamp Ordering Protocol A timestamp is a tag that can be attached to any transaction or any data item, which indicates a specific time on which the transaction or data item
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
What are the disadvantages of file processing system? The drawbacks of file processing systems are a) Data redundancy and inconsistency b) Complexity in accessing data
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Given the subsequent relations: vehicle (reg_no, make, colour) Person (eno, name, address) Owner (eno, reg_no) Write expressions
Locks: Serialisabilty is just a test whether a given interleaved schedule is ok or has a concurrency related trouble. Though, it does not make sure that the interleaved concurrent
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
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