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What does a NATURAL JOIN do in SQL?

easy📝 Conceptual Q11 of 15
SQL - Advanced Joins
What does a NATURAL JOIN do in SQL?
AAutomatically joins tables on all columns with the same names
BJoins tables only on columns with different names
CJoins tables without any condition
DJoins tables using a specified ON condition
Step-by-Step Solution
Solution:

  1. Step 1: Understand the definition of NATURAL JOIN

    A NATURAL JOIN automatically matches columns with the same names in both tables and joins on those columns.

  2. Step 2: Compare with other join types

    Unlike explicit ON conditions, NATURAL JOIN uses all common column names without needing to specify them.

  3. Final Answer:

    Automatically joins tables on all columns with the same names -> Option A

  4. Quick Check:

    NATURAL JOIN = joins on same-named columns [OK]
Quick Trick: Natural join matches all same-named columns automatically [OK]
Common Mistakes:
MISTAKES
  • Thinking NATURAL JOIN joins on different column names
  • Assuming NATURAL JOIN needs ON clause
  • Believing NATURAL JOIN joins without any condition

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