The resulting list ofRIDs contains exactly those tuples that will join, which makes the join efficient.
由此产生的RID列表正好包含那些将要连接的元组,这就使得连接更加有效。
2
Moreover, the ratio between the number of records and the number of index keys indicates, on average, the number ofRIDs associated with each index key.
而且,记录的数量与索引键之间的比例说明,通常,RID 的数量与每个索引键都有关联。
3
It rids your face of dead cells and helps stimulate circulation.