SQL - Window Functions Fundamentals
What happens to the rank values when there are ties in
RANK() compared to DENSE_RANK()?What happens to the rank values when there are ties in RANK() compared to DENSE_RANK()?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how RANK handles ties
RANK assigns the same rank to tied rows but skips subsequent ranks accordingly.Step 2: Understand how DENSE_RANK handles ties
DENSE_RANK assigns the same rank to tied rows but does not skip ranks after ties.Final Answer:
RANK skips numbers after ties; DENSE_RANK does not skip numbers -> Option AQuick Check:
Rank skipping = B [OK]
Quick Trick: RANK skips ranks after ties; DENSE_RANK counts ranks consecutively [OK]
Common Mistakes:
- Thinking both functions skip ranks after ties
- Confusing which function skips ranks
- Assuming no difference in handling ties
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