Explain about relational database management systems?
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Where is dbms used?
What is dbms explain in brief?
What you can do to remove data from the cache and query plans from memory for testing the performance of a query repeatedly?
Explain about normal forms?
Write short notes on manual refreshes.
Explain the role of indexing in databases?
Write the difference between case version and decode version.
You have a table with three columns: amount1, amount2, and amount3 in a single row only one of these three columns will have a value and the other two will be null. Write a sql query to retrieve the values from these columns?
How do you implement one-to-one, one-to-many and many-to- many relationships while designing tables?
1 Answers Flextronics, Hexaware, SQL Star,
Explain the family trees and connection by clause.
What is data modeling with example?
What is the difference between a primary index and a secondary index? What is a duplicate data entry in an index? Can a primary index contain duplicates?
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