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In SQL window functions, what aspect does the ROWS BETWEEN clause define?

easy📝 Conceptual Q1 of 15
SQL - Window Functions Fundamentals
In SQL window functions, what aspect does the ROWS BETWEEN clause define?
AThe type of aggregation function to apply
BThe order in which rows are sorted before aggregation
CThe columns used to partition the data set
DThe range of rows included in the window frame relative to the current row
Step-by-Step Solution
Solution:

  1. Step 1: Understand window functions

    Window functions operate on a set of rows related to the current row.

  2. Step 2: Role of ROWS BETWEEN

    The ROWS BETWEEN clause specifies the exact subset of rows (frame) relative to the current row to include in the calculation.

  3. Final Answer:

    The range of rows included in the window frame relative to the current row -> Option D

  4. Quick Check:

    ROWS BETWEEN defines frame boundaries [OK]
Quick Trick: ROWS BETWEEN sets frame boundaries relative to current row [OK]
Common Mistakes:
  • Confusing ROWS BETWEEN with ORDER BY or PARTITION BY clauses
  • Thinking ROWS BETWEEN defines aggregation type

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