Rows joined on both dept_id and name columns.

Rows joined on dept_id only, with one name column merged.

Solution:Step 1: Identify common columnsBoth tables have columns dept_id and name.Step 2: NATURAL JOIN matches all common columnsJoin happens where both dept_id and name are equal in both tables.Final Answer:Rows joined on both dept_id and name columns. -> Option CQuick Check:NATURAL JOIN matches al

[Solved] Consider tables:employees(emp_id, name, dept_id)departments(dept_id, name)What is the output of:SELECT * FROM employees NATURAL JOIN departments;? | PostgreSQL

PostgreSQL - Joins in PostgreSQL

Consider tables:
employees(emp_id, name, dept_id)
departments(dept_id, name)
What is the output of:
SELECT * FROM employees NATURAL JOIN departments;?

ARows joined on <code>emp_id</code> only.

BRows joined on <code>dept_id</code> only, with one <code>name</code> column merged.

CRows joined on both <code>dept_id</code> and <code>name</code> columns.

DRows joined without any filtering.

Step-by-Step Solution

Solution:

Step 1: Identify common columns
Both tables have columns dept_id and name.
Step 2: NATURAL JOIN matches all common columns
Join happens where both dept_id and name are equal in both tables.
Final Answer:
Rows joined on both dept_id and name columns. -> Option C
Quick Check:
NATURAL JOIN matches all common columns = Rows joined on both dept_id and name columns. [OK]

Quick Trick: NATURAL JOIN merges all same-named columns in join condition [OK]

Common Mistakes:

Assuming only one column is used for join
Expecting separate columns for same names
Thinking NATURAL JOIN ignores common columns

Master "Joins in PostgreSQL" in PostgreSQL

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Consider tables:

Step 1: Identify common columns

Step 2: NATURAL JOIN matches all common columns

Final Answer:

Quick Check:

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