SQL Interview Question and Answers:
1. Define SQL?
Structured query language is the standard command set used to communicate with the relational database management system.
2. Define Dbms?
A Database Management system consists of a collection of interrelated data and set of programs to access that data.
3. What is the purpose of Database systems?
A Database Management system provides a secure and survivable medium for the storage and retrieval of data.In the real world, the data is shared among several users and is persistent.
4. State the different between Security and Integrity?
Security is a protection from malicious attempts to steal or modify data.
Integrity constraints guard against accidental damage to the database, by ensuribg that authorized changes to the database do not result in a loss of data consistency.
5. Define Normalisation?
Normalisation is an essential part of database design. A good understanding of the semantic of data helps the designer to built efficient design using the concept of normalization.
6. What are the purpose of Normalisation?
Minimize redundancy in data.
Remove insert, delete and update anamoly during the database activities.
Reduce the need to reorganize data it is modified or enhanced.
1. Define SQL?
Structured query language is the standard command set used to communicate with the relational database management system.
2. Define Dbms?
A Database Management system consists of a collection of interrelated data and set of programs to access that data.
3. What is the purpose of Database systems?
A Database Management system provides a secure and survivable medium for the storage and retrieval of data.In the real world, the data is shared among several users and is persistent.
4. State the different between Security and Integrity?
Security is a protection from malicious attempts to steal or modify data.
Integrity constraints guard against accidental damage to the database, by ensuribg that authorized changes to the database do not result in a loss of data consistency.
5. Define Normalisation?
Normalisation is an essential part of database design. A good understanding of the semantic of data helps the designer to built efficient design using the concept of normalization.
6. What are the purpose of Normalisation?
Minimize redundancy in data.
Remove insert, delete and update anamoly during the database activities.
Reduce the need to reorganize data it is modified or enhanced.
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