If the master query table has a large volume of data, perhaps millions of rows, then there might be an unacceptable amount of queries issued to the database table on the detail side.
如果主查询表拥有大量数据，比如数百万行，那么向明细端上的数据库表发出的查询量可能难以接受。
Expand the master table node and select the detail node for the related table.
展开主资料表节点，并选取相关资料表的详细资料节点。
Expand the master table node and select the detail node for the related table.
展开主资料表节点，并选取相关资料表的详细资料节点。
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