Conflict equivalence- Two schedules are conflict equivalent if the order of any two conflicting operations is same in both the two schedules.
View equivalence- Two schedules are view equivalent if -
1) Both the schedules have same set of transactions.
2) If in a schedule a read operation r1[X] of transaction T1 reads the value of X written by a write operation w2[x] of transaction T2 or reads the original value of x,then this must also be the case in the other schedule.
3)If operation w3[Y] of a transaction is the last operation to write the value of Y in schedule S then it must also be the last transaction in the other schedule to do so.
All conflict serializable schedules are view serializable.
But all view serializable schedules are not conflict serializable.
Traditional FPS and DBMS both are different from each other. In DBMS there is security of data as well as integrated data while this is not in FPS.
Search operation in static hashing is time consuming, but in dynamic hashing it is not.
dbms
A Database Management System or DBMS provides the interface between users and a database. Some of its tasks include: data integrity, security, recovery of data, support concurrent updates and update data.
if we need a modifying ,sreach,delete a file so we need a DBMS
The 'r'
I'm Looking for the Same awnser. anyone? Thank
database approach
difference between relation sehema and relation instance in dbms
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Traditional FPS and DBMS both are different from each other. In DBMS there is security of data as well as integrated data while this is not in FPS.
A Homogeneous database will have only one DBMS, while heterogeneous databases have multiple DBMS's
A DBMS is a database management system. A database application would be something inside the DBMS such as: ~a way to search files ~a way to pull certain information
save point saves the dbms and check point simply check the database thats it simple
dbms stands for database management system and this mdbms is mulivalue database management system. if we need to store the a multidata then we have to use the mdbms
A DBMS stores data in a table where the entries are filed under a specific category and are properly indexed. This allowed programmers to have a lot more structure when saving or retrieving data. A relational database contains data in more than one table. Each table contains a database that is then linked to other tables with respect to their relationships. Read more: Difference Between DBMS and RDMS | Difference Between | DBMS vs RDMS http://www.differencebetween.net/technology/difference-between-dbms-and-rdms/#ixzz1eJUZkRgz
In DBMS Multiple user can access file at a time. but in flat file system only one user can access file at a time