SQL - Set Operations
What result does the SQL
INTERSECT operator produce when applied between two SELECT statements?What result does the SQL INTERSECT operator produce when applied between two SELECT statements?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand INTERSECT
The INTERSECT operator returns only the rows that are common to both SELECT statements.Step 2: Compare with other set operators
Unlike UNION (which combines all rows) or EXCEPT (which returns rows from the first query not in the second), INTERSECT returns the intersection.Final Answer:
Rows that appear in both SELECT query results -> Option AQuick Check:
INTERSECT returns common rows only [OK]
Quick Trick: INTERSECT returns only common rows between queries [OK]
Common Mistakes:
MISTAKES- Confusing INTERSECT with UNION
- Expecting INTERSECT to return all rows from one table
- Assuming INTERSECT returns rows unique to one query
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