What are the integrity constraints? Explain. Integrity constraints are a set of rules. It is used to
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What are the integrity constraints? Explain.
- Integrity constraints are a set of rules. It is used to maintain the quality of information.
- Integrity constraints ensure that the data insertion, updating, and other processes must be performed in such a way that data integrity is not affected.
- Thus, integrity constraint is used to guard against accidental damage to the database.
- What integrity constraints may be violated by
- Inserting a tuple into relation
- Deleting a tuple from a given relation
- Updating a tuple in a given relation
- Bottom-up database design approach is to group the attributes into relations. This leads to informal design as apposed mapping ERD to Relational schema. What are the informal design criteria?
- What are the join conditions for natural join of two relations?
- What is the difference between 3GL and 4 GL?
- SQL belongs to what generation of programming Language?
- What are the advantages and limitations of SQL?
- Why do you need 3GL (such as PL, C++, Python) and 4GL (SQL) combination for database applications?
Related Book For
Concepts of Database Management
ISBN: 978-1285427102
8th edition
Authors: Philip J. Pratt, Mary Z. Last
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