SQL - Aggregate Functions
Which SQL clause is commonly used with
SUM() to group results by categories?Which SQL clause is commonly used with SUM() to group results by categories?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify grouping usage
TheGROUP BYclause groups rows to apply aggregate functions likeSUM()per group.Step 2: Differentiate other clauses
ORDER BYsorts results,WHEREfilters rows before grouping, andHAVINGfilters groups after aggregation.Final Answer:
GROUP BY -> Option DQuick Check:
SUM() + GROUP BY = grouped sums [OK]
Quick Trick: Use GROUP BY to sum per category [OK]
Common Mistakes:
MISTAKES- Using WHERE instead of GROUP BY
- Confusing HAVING with GROUP BY
- Not grouping when summing categories
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