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PostgreSQL PGCES-02 Exam - Topic 9 Question 29 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 29
Topic #: 9
[All PGCES-02 Questions]

Given the following two table definitions, select one SQL statement which will cause an error. CREATE TABLE sample1 (id INTEGER, data TEXT); CREATE TABLE sample2 (id INTEGER);

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Suggested Answer: A

by Lezlie at Jul 25, 2022, 01:44 AM

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Dusti
5 months ago
I thought all of them would work, surprised by C!
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Lisandra
5 months ago
D looks fine to me, no errors there.
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Sarah
6 months ago
Wait, why would C cause an error?
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Johna
6 months ago
I agree, C is the one!
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Goldie
6 months ago
Option C will cause an error.
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Polly
6 months ago
I’m leaning towards option E causing an error, but I can't quite remember why.
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Lenora
6 months ago
I practiced a similar question, and I feel like option D should work since it joins on the IDs.
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Luke
6 months ago
I'm not sure, but I remember something about aliases. Maybe option B is problematic?
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Shalon
6 months ago
I think option C might cause an error because it references both tables but doesn't specify how they relate.
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Rupert
6 months ago
I've got a strategy here. Since the question is asking about two true statements, I'll methodically evaluate each option and eliminate the ones that are clearly false. That should help me narrow it down to the right answer.
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Carlene
6 months ago
Hmm, I'm a bit unsure about this one. The options all seem related to evaluating the supplier's quality capabilities, so I'll need to think through which one is the least relevant.
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Virgina
6 months ago
This is tricky, but I think the key is to remember that pairwise testing only requires us to cover all possible pairs of variable values, not every possible combination. So with 6 variables, 4 test cases should be sufficient to cover everything.
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Nieves
6 months ago
Okay, I think I've got this. The key is to configure the payment service for the cash and carry desk, so I'll go with option A.
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Alease
6 months ago
The security test really emphasizes the need for an alternative path, so I might lean toward B too, but I feel uncertain about the details.
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Lilli
6 months ago
Hmm, I'm not sure about this one. I know Synapse has different components, but I'm not familiar with how they work with Cosmos DB. I'll have to think this through carefully.
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Lillian
11 months ago
Hey, at least they didn't throw in a table called 'sample3' just to mess with us. That would be too much, even for a certification exam!
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Roy
10 months ago
User 3: I agree, the tables don't have the same columns.
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Josphine
10 months ago
Yeah, that makes sense. Option D is the one that will cause an error.
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Eugene
11 months ago
User 2: I think option D will cause an error.
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Lourdes
11 months ago
User 1: Yeah, that would be too confusing.
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Raina
11 months ago
I agree, the error would occur because there is no 'data' column in sample2.
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Margo
11 months ago
I think option D will cause an error.
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Felix
11 months ago
Hmm, Option C is a bit tricky. Trying to select data where the IDs don't match? That's gotta be a problem.
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Fabiola
12 months ago
I'm going with Option E. Selecting from both tables where the IDs match, and including the data column. Looks good to me!
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Andree
10 months ago
I agree, Option D is the one that would cause an error. It's important to be specific when joining tables.
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Tarra
10 months ago
You're right, Option D would cause an error. It doesn't specify which id to match on between the two tables.
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Lenna
10 months ago
I think Option D would cause an error because it selects id and data from sample1 and sample2 without specifying which id to match on.
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Margarita
10 months ago
Option E is correct. It selects the id and data from sample1 where the id matches in sample2.
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Elina
10 months ago
Great choice! Option E is the correct SQL statement that will not cause an error.
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Lasandra
10 months ago
I agree. Option E is the only statement that includes both tables and the data column.
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Keith
11 months ago
That makes sense. Option E is the only one that joins the tables on the ID column.
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Chauncey
11 months ago
Option E is correct. It selects from both tables where the IDs match and includes the data column.
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Kattie
12 months ago
Hold up, I think Option D might be the one. Trying to select from both tables where the IDs match, but the data column doesn't exist in sample2.
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Azalee
11 months ago
User 2: Yeah, that makes sense. Option D is the one that will cause an error.
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Charlette
11 months ago
User 1: I think you're right, Option D will cause an error because data column doesn't exist in sample2.
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Vivan
1 year ago
Option A seems straightforward enough. Why would that cause an error?
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Stephaine
10 months ago
Option D is correct as it selects id and data columns from sample1 and sample2 where their ids match.
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Lanie
11 months ago
Option C will cause an error because it tries to select the data column from sample1 which does not exist.
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Reyes
11 months ago
Option B is also correct as it uses an alias for the table sample1.
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Herman
11 months ago
Option A is correct because it selects the id column from sample1 without any issues.
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Mireya
1 year ago
Why do you think option C will cause an error?
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Dwight
1 year ago
I disagree, I believe option C is the one that will cause an error.
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Mireya
1 year ago
I think option D will cause an error.
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