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What does an INNER JOIN with multiple conditions do in SQL?

easy📝 Conceptual Q11 of 15
SQL - INNER JOIN
What does an INNER JOIN with multiple conditions do in SQL?
AIt returns rows where all join conditions are true.
BIt returns rows where any one of the join conditions is true.
CIt returns all rows from both tables regardless of conditions.
DIt returns rows only from the first table.
Step-by-Step Solution
Solution:

  1. Step 1: Understand INNER JOIN basics

    INNER JOIN returns rows that have matching values in both tables based on join conditions.

  2. Step 2: Analyze multiple conditions with AND

    When multiple conditions are combined with AND, all must be true for a row to be included.

  3. Final Answer:

    It returns rows where all join conditions are true. -> Option A

  4. Quick Check:

    INNER JOIN + AND = all conditions true [OK]
Quick Trick: All join conditions must be true with AND in INNER JOIN [OK]
Common Mistakes:
MISTAKES
  • Thinking any one condition is enough
  • Confusing INNER JOIN with OUTER JOIN
  • Ignoring the AND operator effect

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