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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
Write a query that display ename annual salary and comm from emp table
differences between a classified catalog and a dictionary catalog
Question 1 What are the advantages of DBMS approach in managing data? Question 2 What are the services provided by a database system Question 3 List and briefly describe
Which data type can store unstructured data? Raw data type can store unstructured data.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
give me a diagram about physical or internal level
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
What is Alternate Key Alternate Key: This is the candidate key which is not taken as the primary key of the table. They are named so because although not the primary key, the
A View may be defined of as a virtual table, that is, a table that does not really exist in its own right but is instead inferred from one or more underlying base data table. T
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