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What do you mean by Correlated subquery?Subqueries, or nested queries, are used to bring back a set of rows to be used by the parent query. Depending on how the subquery is written, it can be implemented once for the parent query or it can be implemented once for everyrow returned by the parent query. If the subquery is implemented for each row of the parent, this is known as correlated subquery.
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken from the similar
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Where does view definition stored? A view definition is permanently stored as part of the database.
1. Define each of the following IN YOUR OWN WORDS: (a) File: (b) Record: (c) Field: (d) Primary Key: (e) Secondary Key: 2. A travel agency wants t
er diagram on cosmetics.
Define average latency time. The average latency time of the disk is one-half the time for a full rotation of the disk.
give some example real life situation where DBMS are most suitable
Which model is record based logical model? Network Modelis basically known as record based logical model.
Representing complex relationship among data A database may contain varieties of data interrelated to each other in numerous ways. A DBMS must have the capability to represent
What is Oracle databse structure? Oracle database structure: The relational model has three main aspects: Structures: Structures are well-defined objects which store th
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