This tells me that I may have an inefficient access path, where DB2 reads more data than it should.
这就说明我可能有一个低效的访问路径,DB 2读取的数据比应该读取的数据更多。
Optimized for one problem: By their nature, hierarchical databases optimized access to the data through one specific path.
针对单个问题的优化:本质上,层次数据库就通过一条指定的路径来优化数据访问。
In addition, the database can have a better understanding of the state of the data it stores, and thereby can produce a more efficient and dynamic access path to the data.
此外,数据库可以更好地理解它存储的数据的状态,从而可以生成到数据的更有效和动态的存取路径。
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