PostgreSQL Exam PGCES-02 Topic 1 Question 79 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam

Question #: 79
Topic #: 1

A set of tables are defined as follows: t1 t2 How many rows are returned by executing the following SQL statement? SELECT * FROM t1 LEFT OUTER JOIN t2 USING (id);

A2 rows

B3 rows

C4 rows

D5 rows

E6 rows

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Suggested Answer: A, E

by Janessa at Jan 11, 2025, 08:27 PM

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Gayla

1 months ago

The answer is obviously E) 6 rows. Why? Because the more options, the better the chances of guessing correctly, right? *winks*

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Quentin

1 months ago

Definitely C) 4 rows. I'm so confident about this that I'm already planning my victory dance.

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Aaron

8 days ago

I think it's A) 2 rows.

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Shawnta

1 months ago

Wow, this is a tricky one! I'm going to go with D) 5 rows. Who knows, maybe there's some hidden magic in the database that'll surprise us all.

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Carri

1 months ago

I'm pretty sure the answer is B) 3 rows. The LEFT OUTER JOIN will only return the rows where there is a match between the two tables.

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Nieves

2 months ago

The correct answer is C) 4 rows. The LEFT OUTER JOIN will return all rows from the t1 table, even if there are no matching rows in the t2 table.

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Leanna

27 days ago

Yes, you're right. The LEFT OUTER JOIN will return all rows from t1 table.

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Audra

1 months ago

I think it's 4 rows

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Buddy

2 months ago

I believe the answer is C) 4 rows, as it includes all rows from t1 and t2.

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Luis

2 months ago

I agree with Tijuana, because there are 2 rows in t1 and 1 row in t2.

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Tijuana

2 months ago

I think the answer is B) 3 rows.

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