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PostgreSQL PGCES-02 Exam - Topic 4 Question 95 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 95
Topic #: 4
[All PGCES-02 Questions]

Select the correct result generated by execution of the following SQL statements:

CREATE TABLE log (id int, message TEXT, logtime TIMESTAMP); CREATE

TABLE log_01 () INHERITS (log);

INSERT INTO log_01 VALUES (1, 'error', CURRENT_TIMESTAMP);

SELECT * FROM log;

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Suggested Answer: E

by Larae at Jan 28, 2026, 06:04 AM

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Carman
15 days ago
It should show the inserted row in log_01, right?
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Hortencia
20 days ago
I thought you couldn't select from the parent table like that?
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Deandrea
25 days ago
Wait, does log_01 actually have the data from log?
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Nakisha
1 month ago
Totally agree, the inheritance is key here!
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Jonell
1 month ago
The log table is created first.
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Elenora
1 month ago
Wait, is this a trick question? I'm so confused, but I'm going to go with the empty result set too. Gotta play it safe, you know?
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Keith
2 months ago
Haha, this question is like a game of SQL Jeopardy! I'm going to go with the empty result set just to be safe.
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Vilma
2 months ago
I think the question is trying to trick us. The data should be in the log table since it's being inserted into the child table log_01.
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Ailene
2 months ago
Hmm, I'm not sure about that. Shouldn't the data be visible in the parent table log as well?
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Frederica
2 months ago
The correct result is an empty result set, as the data is inserted into the child table log_01 and not the parent table log.
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Johana
2 months ago
I believe the log table won't show the inserted row since it only exists in log_01. I hope I remember this correctly!
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Aileen
2 months ago
This reminds me of a practice question where we had to deal with table inheritance. I feel like the output will be empty too, but I can't recall the exact details.
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Lenita
3 months ago
I'm not entirely sure, but I remember something about inheritance in SQL. The data might not show up in the parent table since the insert was done in the child table.
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Chanel
3 months ago
I think the SELECT statement will return an empty result because we are selecting from the parent table, and we haven't inserted anything into it.
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Casey
4 months ago
Alright, let me walk through this step-by-step. We create the 'log' table, then create 'log_01' as a child table that inherits from 'log'. When we insert into 'log_01', that data gets propagated up to the parent 'log' table. So the SELECT should return the row we inserted. I think I've got the right approach here.
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Davida
4 months ago
I think I've got this. Since 'log_01' inherits from 'log', any rows inserted into 'log_01' will also be visible in the 'log' table. So the SELECT * FROM log; should return the row we inserted into 'log_01'. Feeling pretty confident about this one.
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Hester
4 months ago
I'm a bit confused on the table inheritance part. Does that mean the data in 'log_01' will automatically show up in the 'log' table? I'll need to review how that works before answering this.
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Evangelina
4 months ago
Okay, let's see here. We're creating a table 'log' and then creating a child table 'log_01' that inherits from it. Then we insert a row into 'log_01'. The question is asking what the SELECT * FROM log; will return. Interesting, let me work this through.
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Marcos
4 months ago
Hmm, this looks like a question on inheritance and polymorphism in SQL. I'll need to think through how the table inheritance works and how the data gets propagated.
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