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PostgreSQL PGCES-02 Exam - Topic 10 Question 76 Discussion

Select an incorrect statement regarding the following SQL statement. Note that "user_view" is a view. CREATE OR REPLACE RULE rule_1 AS ON UPDATE TO user_view DO INSTEAD NOTHING;
B) It will replace 'rule_1' if it already exists.
A) It is defining a rule 'rule_1'.
C) Executing 'UPDATE user_view' will no longer output errors.
D) When executing 'UPDATE user_view', data is updated in the table that is the origin of the view.
E) 'DROP RULE rule_1 ON user_view' deletes the above definition.

PostgreSQL PGCES-02 Exam - Topic 10 Question 76 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 76
Topic #: 10
[All PGCES-02 Questions]

Select an incorrect statement regarding the following SQL statement. Note that "user_view" is a view. CREATE OR REPLACE RULE rule_1 AS ON UPDATE TO user_view DO INSTEAD NOTHING;

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Suggested Answer: B

by Edward at Oct 19, 2024, 03:08 PM

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Lucina
7 months ago
'DROP RULE' will definitely delete that rule!
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Diane
8 months ago
Nope, it doesn't update the underlying table.
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Andree
8 months ago
Wait, does that mean no errors on UPDATE? Sounds off.
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Salina
8 months ago
Totally agree, it replaces the existing rule too.
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Penney
8 months ago
It's defining a rule 'rule_1'.
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Onita
9 months ago
I remember that option A is definitely correct because it clearly states that a rule is being defined, but I’m a bit confused about option E and how it relates to dropping rules.
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Claribel
9 months ago
I practiced a similar question where we had to identify incorrect statements about rules, and I feel like option B is definitely true since "CREATE OR REPLACE" suggests it will replace an existing rule.
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Annamaria
9 months ago
I'm not sure about option D; it sounds like it could be correct since views usually reflect the underlying table, but I'm not entirely confident.
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Gabriele
9 months ago
I think option C might be the incorrect statement because I remember that rules can prevent errors but don't necessarily stop them completely.
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Thea
9 months ago
I'm not totally sure about this one. I'll make my best guess, but I may need to come back to it if I'm still unsure.
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Jackie
9 months ago
I've seen this type of question before. The trick is to focus on what the rule is actually doing - it's preventing updates to the view, not the underlying table.
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Wava
9 months ago
Okay, let me think this through step-by-step. The rule is defining a behavior for updates to the view, so I'll need to consider how that impacts the data.
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Remedios
9 months ago
Hmm, I'm a bit confused by this one. I'll need to review the details on SQL rules and views to figure this out.
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Iluminada
9 months ago
I'm pretty confident I know the correct answer here. The key is understanding what a rule does in SQL.
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Glenn
1 year ago
Option B seems to be the correct answer. The 'CREATE OR REPLACE RULE' statement will replace the existing 'rule_1' if it already exists.
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Alline
1 year ago
C) Executing 'UPDATE user_view' will no longer output errors.
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Geraldo
1 year ago
User: Option B seems to be the correct answer.
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Jamal
1 year ago
B) It will replace 'rule_1' if it already exists.
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Yaeko
1 year ago
A) It is defining a rule 'rule_1.'
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Felicia
1 year ago
Wow, this question is really testing our SQL knowledge! I guess the developers who wrote this exam are trying to keep us on our toes. *chuckles*
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Katie
1 year ago
User 2: I think the incorrect statement is C) Executing 'UPDATE user_view' will no longer output errors.
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Lenna
1 year ago
User 1: Yeah, this question is definitely challenging.
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Tatum
1 year ago
I think option C is the incorrect statement. Executing 'UPDATE user_view' will still output errors if the update operation is not permitted on the underlying table.
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Cyndy
1 year ago
Option D is incorrect. When 'UPDATE user_view' is executed, the data is not updated in the table that is the origin of the view. The update is instead suppressed by the INSTEAD NOTHING rule.
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Juliann
1 year ago
But doesn't the SQL statement specify 'DO INSTEAD NOTHING'? That means no data will be updated, right?
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Val
1 year ago
I disagree, I believe the correct answer is D.
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Juliann
1 year ago
I think the correct answer is C.
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