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Give the general form of SQL query?
Select A1, A2............., An
From R1, R2..............., Rm
Where P
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken from the similar
Explain the terms primary key, candidate key, alternate key and secondary key. In the given table identify every key? STUDENT(SID,Regno, Name, City) Primary Key: The prim
Question 1 Define OLTP? Explain the Differences between OLTP and Data Warehouse Question 2 What is Architecture? Explain various components involved in it Question
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Define Assertions in SQL a. An assertion is a predicate that is expressing a condition we wish the database to always satisfy. b. Domain constraints, functional dependency
What is a Name? A user-supplied name is used for identity. This form of identity is used for files in file systems. The user gives every file a name that uniquely identifies it
Fragmentation: It is definite as partitioning of a relation into various fragments.Every fragment can be stored at a dissimilar site.
what is lossless & dependency preserving decomposition ?
In which format database schema is written ? Data base schema is written in the DDL format.
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
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