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The Basic 2PL:The basic two phase locking allows release of lock at any time after all the locks have been obtained. For instance, we can release the locks in schedule of Figure, after we have gone through the values of Y and Z in transaction 11, even before the display of the sum. This will increase the concurrency level. The basic 2PL is given graphically in Figure.
Using SQL create a view RS for the relations R and S. The view consists of the columns A and D renamed as X and Y in that order. Insert a tuple into it. Show the contents of t
DISADVANTAGES OF RDBMS
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Write a query that display ename annual salary and comm from emp table
vertical fragmentation
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
What is Trigger? Trigger: A database trigger is procedural code which is automatically executed in response to specific events on a particular table in a database. Triggers can
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
Determine the Advanced modeling concepts You have to follow some steps for object-oriented design. These steps for OO Design methodology are as follow: 1) Produce objec
What is the full form of DDL? DDL is stand for Data Definition Language.
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