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Which of the following is a safe practice to avoid risks with NATURAL JOIN?

easy📝 Conceptual Q2 of 15
SQL - Advanced Joins
Which of the following is a safe practice to avoid risks with NATURAL JOIN?
AJoin tables with no common column names
BUse NATURAL JOIN without checking column names
CRename columns to avoid unintended matches before joining
DAlways use CROSS JOIN instead
Step-by-Step Solution
Solution:

  1. Step 1: Understand the cause of NATURAL JOIN risks

    Risks come from joining on unintended columns with the same name.

  2. Step 2: Identify how to avoid unintended matches

    Renaming columns to unique names prevents NATURAL JOIN from joining on wrong columns.

  3. Final Answer:

    Rename columns to avoid unintended matches before joining -> Option C

  4. Quick Check:

    Safe NATURAL JOIN = rename columns first [OK]
Quick Trick: Rename columns to control NATURAL JOIN keys [OK]
Common Mistakes:
MISTAKES
  • Ignoring column names before NATURAL JOIN
  • Using CROSS JOIN as a substitute without reason
  • Assuming NATURAL JOIN works safely with no common columns

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