Partition Table - Search Videos

Partitioning a table: scan only what you need | data engineering interview

YouTubeThe Data Round

Partitioning a table: scan only what you need | data engineering interview

Scanning 2 billion rows to read 7 days of them. That's the whole problem. The answer is partitioning: split the table physically by a column, usually date, so the engine reads only the chunks it needs. With a date partition, a filter on last week lets the planner skip every other partition. That's partition pruning, and it can turn a full scan ...

289 views2 weeks ago

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