The join is performed by scanning the inner table of the hash join, CUSTOMERS, and generating a lookup table by hashing the join column values.

该连接的执行过程包括扫描散列连接中的内表CUSTOMERS，并通过散列连接列的值生成一个查找表。

youdao

IT then reads from the outer table BAD_CREDIT using the SHIP operator, hashing the join column values, and checking in the lookup table generated for the inner table.

然后，它使用SHIP操作符读外表BAD_CREDIT，散列连接列的值，并检查为内表生成的查找表。

youdao

If there is an index on the join column, the costs will be significantly less; otherwise the database server must perform table scans for all tables, both outer and inner tables.

如果连接列上有一个索引，那么其成本会相当低；否则，数据库服务器就必须对所有表(外部和内部表)执行表扫描。

youdao

Vaughan then announced his sabbatical from the game but recently hinted in his newspaper column that he would join the Performance Programme.

BBC: Vaughan to join performance squad

Bob Mondello, NPR's film and art's critic will join us to talk a little bit more about that in the new column, Brother's Film.

NPR: The Week in Iraq