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For this application, we will consider IBM DB2 catalog data (i.e., metadata) for IBM's enterprise-class servers running the z/OS (formerly OS/390 or MVS) operating system. One of
what is meant semantic query optimization? how does it differ from other query optimization techniques?
does tables are called relations
example of bank
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 it
For each m:n relationship type R, we make a new table (say S) to represent R. We also contain the primary key attributes of both the participating entity types as a foreign key att
What is the role of a database administrator?
Question 1 What do you mean by database management system? Question 2 Write a note on Object-Oriented Model Question 3 Explain Sequential File Organization Question
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Which is the properties of entities? Attributes is the properties of entities.
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