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Alibaba Exam ACA-Operator Topic 6 Question 55 Discussion

Actual exam question for Alibaba's ACA-Operator exam
Question #: 55
Topic #: 6
[All ACA-Operator Questions]

When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)

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Suggested Answer: A, C, D

by Eladia at Mar 16, 2024, 02:09 PM

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Mammie
6 months ago
Definitely, it can improve query optimization by using the correct index order.
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Jolene
6 months ago
I've heard that adhering to the rightmost prefix principle when using composite indexes is a good practice too.
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Isreal
6 months ago
That makes sense, it can speed up data retrieval.
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Luis
6 months ago
I believe applying indices to fields with many records can also be helpful.
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Mammie
6 months ago
Yes, that can definitely improve query performance.
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Isreal
6 months ago
I think adding an index to a field that is frequently queried is important.
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Lili
6 months ago
I think adding indexing to fields of fixed length can also be helpful in speeding up data retrieval.
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Reid
7 months ago
Yes, that's a good point. It helps in optimizing the search queries.
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Eladia
7 months ago
I believe we should also adhere to the rightmost prefix principle when using composite indexes.
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France
7 months ago
I agree with that. It will help improve the performance of the queries.
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Hyman
7 months ago
I think we should add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
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