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Compute a 7-day moving average and other rolling aggregates with SQL window frames.

The subtlety in rolling aggregates is the window frame clause, especially ROWS vs RANGE. The signal is the correct frame for a moving window and the tied-rows gotcha that corrupts running totals.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

The subtlety in rolling aggregates is the window frame clause, especially ROWS vs RANGE. The signal is the correct frame for a moving window and the tied-rows gotcha that corrupts running totals.

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