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One million $lookup challenge

I you have read my previous post $lookup: more than just a SQL join, you understand that $lookup is not designed to join scalar values from thousands of documents. $lookup is useful at the end of an aggregation pipeline, not before the aggregation (examples in Comparison of JOINS

Jun 19, 2025 - 16:40
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One million $lookup challenge

I you have read my previous post $lookup: more than just a SQL join, you understand that $lookup is not designed to join scalar values from thousands of documents. $lookup is useful at the end of an aggregation pipeline, not before the aggregation (examples in Comparison of JOINS

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