Days Above the Moving Average

Return the days when sales exceeded the average of the previous two days (only days with two predecessors). Order by day.

Table schema

Daily(day DATE PRIMARY KEY, sales INT)

Sample data

day | sales
2026-01-01 | 10
2026-01-02 | 30
2026-01-03 | 20
2026-01-04 | 50
2026-01-05 | 40