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Oracle Exam 1Z0-909 Topic 1 Question 51 Discussion

Actual exam question for Oracle's 1Z0-909 exam
Question #: 51
Topic #: 1
[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

by Yasuko at Sep 15, 2024, 05:41 AM

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Brice
2 months ago
Hold up, why not HASH the user_name index? That's the real secret sauce! *wink wink*
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Fallon
23 days ago
G) CREATE INDEX 1X5 ON users (loc_id);
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Wilford
24 days ago
F) CREATE INDEX 1X2 ON locations (loc_mapping) USING HASH; fH
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Xochitl
24 days ago
E) CREATE INDEX 1X3 ON locations
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Dong
25 days ago
D) CREATE INDEX 1X6 ON users (user_name);
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Emiko
29 days ago
C) CREATE INDEX IX1 ON locations (loc_shareci) ;
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Tiera
1 months ago
B) CREATE INDEX 1X4 ON Locations (site_id, loc_shared);
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Lavonna
1 months ago
A) CREATE INDEX 1X7 ON users (user_name) USING HASH;
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Weldon
2 months ago
I'm not sure, but I think option G could also potentially improve performance.
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Latrice
2 months ago
I agree, B and D are the way to go. The other options are either irrelevant or not as effective.
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Dalene
2 months ago
I agree, B and D are the way to go. The other options are either irrelevant or not as effective.
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Kristine
2 months ago
D) CREATE INDEX 1X6 ON users (user_name);
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Lea
2 months ago
B) CREATE INDEX 1X4 ON Locations (site_id, loc_shared);
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Chanel
3 months ago
I agree with Britt, those indexes seem like they would help speed up the query.
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Mitsue
3 months ago
Option B and D seem to be the best choices here. Creating indexes on the columns used in the WHERE clause can significantly improve query performance.
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Matt
3 months ago
Yes, options B and D are the ones that will improve query performance the most.
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Matt
3 months ago
I agree, creating indexes on columns used in the WHERE clause is important for query performance.
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Britt
3 months ago
I think option B and D will improve query performance.
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