The values of the attribute describes a particular
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The language that requires a user to specify the data to be retrieved without specifying exactly how…
Relationships among relationships can be represented in an-E-R model using
Union operator is a :
In SQL the word natural can be used with
What will be the number of columns and rows respectively obtained for the operation, A- B, if A B are…
In an ER diagram the ___shape specifies the Attibute and a ____ shape specifies the primary key attribute.
In SQL, testing whether a subquery is empty is done using
Dependency preservation is not guaranteed in
______is a preferred method for enforcing data integrity
An advantage of views is
In multiple granularity of locks SIX lock is compatible with
Which of the following is a reason to model data?
In SQL the statement select * from R, S is equivalent to
A list consists of last names, first names, addresses and pin codes. If all people in the list have…
The ______ key of a relation is the attribute (column) or collection of attributes, which uniquely identify…
Whenever two independent one-to-many relationships are mixed in the same relation, a __________ arises.
A ____ key specifies a uniqueness constraint that no two distinct tuples in any state r of relation…
Which of the following is not a consequence of concurrent operations?
The keyword to eliminate duplicate rows from the query result in SQL is
Maximum height of a B+ tree of order m with n key values is
The concept of mapping of ______ entity types is the concept in which the for each strong entity type…
approach reduces time and effort required for design and lesser risk in database management.
What are the desirable properties of a decomposition
The common column is eliminated in
The size of a data item is called its _______, which can be a field of some record or may be a larger…
Which of the following addressing modes permits relocation without any change over in the code?
The graphical representation of a query is .
The part of a database management system which ensures that the data remains in a consistent state is
______defines the structure of a relation which consists of a fixed set of attribute-domain pairs.
Manager salary details are hidden from the employee .This is
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