# Join Technology (C)

+ `Index Join (Index Nested Loop Join)`:
  + column that need to be joined are arranged in an orderly manner. They can be queried by index scanning or sort. In parallel, the query scope of the driving table is constructed according to the ordered data of the driving table, and then matched with the batch-driven driving table data.
  + Multi-threaded parallelism, suitable for scenario driving table result sets are small (around 10,000 rows)

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