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PostgreSQL Exam PGCES-02 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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Lillian
3 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
1 months ago
User 3: I agree, the tables don't have the same columns.
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Josphine
2 months ago
Yeah, that makes sense. Option D is the one that will cause an error.
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Eugene
2 months ago
User 2: I think option D will cause an error.
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Lourdes
2 months ago
User 1: Yeah, that would be too confusing.
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Raina
2 months ago
I agree, the error would occur because there is no 'data' column in sample2.
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Margo
2 months ago
I think option D will cause an error.
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Felix
3 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
3 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
25 days 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
26 days 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
27 days 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
28 days ago
Option E is correct. It selects the id and data from sample1 where the id matches in sample2.
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Elina
29 days ago
Great choice! Option E is the correct SQL statement that will not cause an error.
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Lasandra
1 months ago
I agree. Option E is the only statement that includes both tables and the data column.
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Keith
2 months ago
That makes sense. Option E is the only one that joins the tables on the ID column.
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Chauncey
2 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
3 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
2 months ago
User 2: Yeah, that makes sense. Option D is the one that will cause an error.
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Charlette
2 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
3 months ago
Option A seems straightforward enough. Why would that cause an error?
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Stephaine
2 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
2 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
2 months ago
Option B is also correct as it uses an alias for the table sample1.
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Herman
3 months ago
Option A is correct because it selects the id column from sample1 without any issues.
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Mireya
3 months ago
Why do you think option C will cause an error?
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Dwight
4 months ago
I disagree, I believe option C is the one that will cause an error.
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Mireya
4 months ago
I think option D will cause an error.
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