Greg Stark <gsst...@mit.edu> wrote: > your query does require reading all the data. Huh? It requires reading all the data from at least *one* of the tables. I could conceivably be faster to read all the data from the table with 23,980 rows and randomly pick out the necessary 33,768 rows from the table with 33,909,690 rows using the idx_order_items_order_id index. That seems like it might be faster. -Kevin
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