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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)
Suggested Answer: A, C, D
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14 comments · newest first
TA
Tatum
10 months ago
I thought composite indexes were just a suggestion, not a rule?
OS
Osvaldo
10 months ago
Fixed length fields are definitely better for indexing.
LI
Linwood
10 months ago
Wait, are you saying more than 6 indexes is bad?
LO
Lonna
11 months ago
Totally agree, indexing is key for performance.
ED
Eden
11 months ago
Full table scans can really slow things down!
DE
Dean
11 months ago
The rightmost prefix principle for composite indexes was mentioned in our last practice session, so I feel confident about option E being a good choice.
BE
Belen
11 months ago
I vaguely recall something about limiting the number of indexed fields, but I can't remember if it was 6 or a different number.
DE
Deandrea
12 months ago
I think option B sounds familiar, but I’m a bit confused about how many records are considered "many" for applying indices.
OL
Oliva
12 months ago
I remember we discussed that adding indexes to frequently queried fields is important, but I’m not sure if it’s the best practice for fields that change often.
AL
Alesia
12 months ago
I think I've got a good handle on this. The key is to add indexes to frequently queried fields, but avoid over-indexing the table.
KA
Karl
1 year ago
Hmm, I'm a bit unsure about the specifics here. I'll need to review my notes on indexing strategies to make sure I get this right.
DE
Devorah
1 year ago
Ah, I've seen this type of question before. The key is to focus on best practices for creating effective indexes.
MA
Malinda
1 year ago
Okay, let me think this through. I know that indexes can improve query performance, but I need to be careful about how I use them.
AL
Altha
1 year ago
This question seems straightforward, but I want to make sure I understand the key points before answering.