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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 Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
construct a b-tree for the following set of key values 2,3,5,7,11,17,19,23,29,31.assume that the tree is initial empty and the values are added in ascending order
Define DBA database administrator? DBA : A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. In common, these involves:
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
In Database software have only pure security or some dis secured by administrator?
prototype of a distributed information system for a national car part retail outlet chain.
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
project on dbms
What are the factors to be taken into account when choosing a RAID level? A) Monetary cost of extra disk storage requirements. B) Performance requirements in terms of number
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