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ALTER TABLE Command: This command is used for variation of existing structure of the table in the given situation:
Syntax
ALTER TABLE
You require to put many constraints like that the database integrity is not compromised.
If R1 and R2 are two relations or functions, then the result of R3 = R1 × R2 is the combination of tuples that are in R1 and R2. The product is associative and commutative. Degr
what are the reasons having variable length records
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Durability : This property necessitates that once a transaction has committed, the changes made by it be never lost because of subsequent failure. Thus, a transaction is also a bas
normal forms
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
Explain three main attributes of data.
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
Express the properties of Strings? Strings can be case sensitive (or not) which can change the outcome of string operations. You can evaluate whole strings \ just part
This project requires you to create a database design. Your design will be documented in a set of Entity-Relationship diagrams. Draw a set of Entity-Relationship diagrams to mode
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