Tricky Database Interview Question🤯
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Tricky Database Interview Question🤯
Database Design: Zero-Downtime Schema Migrations at Scale! Zero-downtime schema migration on a 300 million row table, done while users read and write to it 24/7. The obvious move is to add the column and update every row in one go. On a live table that locks huge numbers of rows, and suddenly every user request is stuck waiting on you. There's ...
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