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Oracle Exam 1Z0-909 Topic 9 Question 45 Discussion

Actual exam question for Oracle's 1Z0-909 exam
Question #: 45
Topic #: 9
[All 1Z0-909 Questions]

Examine these statements which execute successfully:

Which two changes will improve this query performance?

Show Suggested Answer Hide Answer
Suggested Answer: A, D

Contribute your Thoughts:

Sherrell
3 months ago
I'm not sure about option E and G, they might not be as effective.
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Taryn
3 months ago
I believe option A and F could also help in improving performance.
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Regenia
3 months ago
Option E is clearly a mistake - loc_site_id is not a valid column name. I'm going with B and D as the correct answers.
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Desmond
3 months ago
User 2
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Derrick
3 months ago
User 1
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Vilma
3 months ago
I agree with Dalene, those indexes seem relevant to the query.
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Terrilyn
3 months ago
Haha, I bet the exam writer just threw in that silly index name 1X3 on loc_shareci to trip us up. Nice try, but I'm not falling for that one!
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Dalene
4 months ago
I think option B and D will improve query performance.
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Dannette
4 months ago
I'm not sure about the HASH index on user_name in option A. Btree is usually better for equality lookups. Option F also looks a bit weird with the typo in the index name.
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Robt
2 months ago
We should probably go with Btree for user_name index. And yes, option F definitely has a typo that needs to be fixed.
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Joanne
3 months ago
I agree, Btree is usually better for equality lookups. And yes, option F does look a bit strange with that typo.
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Glendora
3 months ago
I think you're right about the HASH index on user_name, Btree might be better for that. Option F does have a typo in the index name.
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Jospeh
4 months ago
Option B and D seem like the best choices to improve performance. Indexing the columns used in the WHERE clause can really boost query speed.
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Loreta
2 months ago
Let's go ahead and implement those changes then.
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Almeta
2 months ago
Agreed, those indexes will definitely improve query performance.
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Verona
3 months ago
Creating indexes on the columns used in the WHERE clause is key.
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Nichelle
3 months ago
I think option B and D are the way to go.
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