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Describe Database state in details?
Database state: The actual data within the database at a particular moment in time is known as a database state.
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
What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.
write-set(T): Each data items that are written by a transaction T
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
Which database object does not physically exist? A view database object does not physically exist.
construct a B+ tree for the following set of key value (2,3,5,7,11,19,23,29,31) in ascending order where the pointers that will fit in one node is as follows:A. four B. six C. eigh
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
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