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Depending upon the rules we have found, we can classify the locks into two types.
Shared Lock: A transaction might be acquiring shared lock on a data item in order to read its content. The lock is shared in the sense that any other transaction can obtain the shared lock on that similar data item for reading purpose.
Exclusive Lock: A transaction might be acquiring exclusive lock on a data item in order to both read/write into it. The lock is excusive in the sense that no other transaction can acquire any type of lock (either shared or exclusive) on that similar data item.
Extend your CREATE TABLE statement from problem 3 with referential integrity constraints. Updates and deletes on related rows are restricted. 6. From examination of the sample data
State your technical objectives for mining the data. Data Understanding. Describe the data For each attribute, give its description and data type. For numeric attributes
Determine the Disadvantages of file based systems Some of the disadvantages of file based systems are like this: Data redundancy and inconsistency: the dissimilar applic
Discuss the problem of Spurious tuples and how we may prevent it. Ans: A spurious tuple is, mainly, a record in a database that gets created while two tables are joined bad
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
under what condition log based recovery is feasible?
Ask question #MinimThe Georgia Tech Library (GTL) has approximately 16,000 members, 100,000 titles, and 250,000 volumes (an average of 2.5 copies per book). About 10 percent of the
What is property - properties of a database ? It is an integrated collection of logically related records. It consolidates separate files into a common pool of data records and
Discuss the term- Design Optimization We have seen various ways of representing the objects.The fundamental design model uses analysis model as the framework for implementati
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