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Databases & data modellingMediumSDE-2
You need to rename a column and change its type on a 500M row table that takes 20,000 writes per second. How do you do it without downtime?
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AtlassianFlipkartRazorpay
Think first
Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.
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