Problem
Write a SQL query to calculate the difference in days between consecutive order dates for each customer in a transactions table.
Practicing as: Data Engineer interview at ZEISS GroupHi, I'll play your ZEISS Group interviewer for the Data Engineer role. Candidates describe these interviews as often stressful and moderately difficult, so expect me to be direct and to the point. Take your time with the question above and answer like we're in the room.
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