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Which indices search key defines the sequential order of file and which indices search key specifies an order different from sequential order of file?
- a)Primary, Secondary
- b)Clustering, Primary
- c)Non-clustering, Secondary
- d)Clustering, Secondary
Correct answer is option 'A'. Can you explain this answer?
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Which indices search key defines the sequential order of file and whic...
Primary indices search key defines the sequential order of fill while secondary indices search key defines an order different from sequential order of fills.
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Which indices search key defines the sequential order of file and whic...
Understanding Primary and Secondary Indices
In database systems, the organization of data and the way it is indexed play a crucial role in the efficiency of data retrieval. The concepts of primary and secondary indices help us understand how data is ordered and accessed.
Primary Index
- A primary index is created on the key attribute of a file.
- It defines the sequential order of the data in the file.
- Each entry in the primary index corresponds to a unique key in the data file, making it efficient for lookups.
- The primary index follows the same order as the records in the file, which enhances performance for range queries.
Secondary Index
- A secondary index is created on non-key attributes.
- It allows for searching data based on attributes that are not the primary key.
- The order of the entries in a secondary index can differ from the sequential order of the file.
- This flexibility enables quick access to data based on various criteria, but it may involve more overhead in terms of maintenance and storage.
Conclusion
The correct pair of indices that define the sequential order of a file and allow for a different order are:
- Primary Index: Defines the sequential order.
- Secondary Index: Specifies an order different from the sequential order of the file.
Thus, the answer to the question is option 'A' - Primary for sequential order and Secondary for non-sequential order. Understanding these concepts is essential for efficient database design and optimization in Computer Science Engineering.
In database systems, the organization of data and the way it is indexed play a crucial role in the efficiency of data retrieval. The concepts of primary and secondary indices help us understand how data is ordered and accessed.
Primary Index
- A primary index is created on the key attribute of a file.
- It defines the sequential order of the data in the file.
- Each entry in the primary index corresponds to a unique key in the data file, making it efficient for lookups.
- The primary index follows the same order as the records in the file, which enhances performance for range queries.
Secondary Index
- A secondary index is created on non-key attributes.
- It allows for searching data based on attributes that are not the primary key.
- The order of the entries in a secondary index can differ from the sequential order of the file.
- This flexibility enables quick access to data based on various criteria, but it may involve more overhead in terms of maintenance and storage.
Conclusion
The correct pair of indices that define the sequential order of a file and allow for a different order are:
- Primary Index: Defines the sequential order.
- Secondary Index: Specifies an order different from the sequential order of the file.
Thus, the answer to the question is option 'A' - Primary for sequential order and Secondary for non-sequential order. Understanding these concepts is essential for efficient database design and optimization in Computer Science Engineering.
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Which indices search key defines the sequential order of file and which indices search key specifies an order different from sequential order of file?a)Primary, Secondaryb)Clustering, Primaryc)Non-clustering, Secondaryd)Clustering, SecondaryCorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which indices search key defines the sequential order of file and which indices search key specifies an order different from sequential order of file?a)Primary, Secondaryb)Clustering, Primaryc)Non-clustering, Secondaryd)Clustering, SecondaryCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which indices search key defines the sequential order of file and which indices search key specifies an order different from sequential order of file?a)Primary, Secondaryb)Clustering, Primaryc)Non-clustering, Secondaryd)Clustering, SecondaryCorrect answer is option 'A'. Can you explain this answer?.
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