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我需要加入 2 个超过 2000 万记录的表。下面提到的哪个解决方案是好的
1 one Oledb componet and a lookup component
或者
2 Two oldeb componets,2 sort componets and a merge join componets
取决于您需要查找表中的字节数。如果您选择合并连接,那么通过键读取 by sql 排序然后直接连接到合并连接转换可能是一个好主意。
当有许多记录时,查找选项更好:它提供更好的性能,因为它是同步转换。