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Write short notes on transaction state?
A transaction may not always complete its implementation successfully such a transaction is termed aborted
A transaction must be in one of the following states
Active
Partially committed
Failed
Aborted
Committed
What is the use of sub queries? A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membershi
What is banker's algorithm? Banker's algorithm is a deadlock avoidance algorithm that is applicable to a resource-allocation system with multiple instances of each resource ty
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
Hi, Do you offer private tuition for DBMS?
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
What are the functions of an accumulator? The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It hol
object oriented database
we need example of 2phase locking
Describe the types of attributes? Types of attributes: An attribute's category determines the type of values that are permitted in the attribute. For instance, the value vers
Can we delete data element, which is being used by table fields. No we cant delete data element.
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