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What is a data dictionary?
A data dictionary is a data structure which keeps Meta data about the structure of the database i.e. the schema of the database.
What are the three data anomalies that are similarly to take place as a result of data redundancy? Can data redundancy be completely eliminated in database approach? Why or why n
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
what factors might influence a company to outsource its IT infrascture.
Define Shared locks? Ans: Shared lock: Throughout concurrent execution of transactions, earlier than a transaction can access a data item, it has to obtain a lock on it. Now he
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
What is bucket overflow and how bucket overflow is handled through Over Flow Chaining or Closed Hashing? Ans: Bucket: unit of storage holding records. Bucket is a disk block
What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p
What is conceptual model ? A conceptual model is a independent of both hardware and software.
find a name whose address is erode from student table
what should be included in this???
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