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Re:Show HN: Data Diff – compare tables of any size across da... by erezsh on Thursday June 23, 2022 @02:15AM (#31845723)
data-diff has several advantages over running the query you wrote here.

- data-diff can compare tables across different databases. Your query is limited to one database.

- For very big tables, your 'select' will time-out. data-diff splits the diff into small segments, so we side-step this issue.

- data-diff supports running in threaded mode, which means it can finish a LOT faster. (especially for cloud databases.)

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