If both join inputs are large and the two inputs are of similar sizes, a merge join with prior sorting and a hash join offer similar performance.

 
  • 如果兩個(gè)聯(lián)接輸入都很大,而且這兩個(gè)輸入的大小差不多,則預先排序的合并聯(lián)接提供的性能與哈希聯(lián)接相近。
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