Any query such as the one in Listing 1 has a precise path to the specified datum, which a DBMS can quickly determine in balanced trees and byte-offset codings.
如清单 1 中所示的任何查询都有到指定数据的精确路径，DBMS 可以迅速地在均衡树和字节偏移编码中确定它。
DB2 places its data starting at the 512 byte offset (1024 on HP-UX) so this is where you should start copying from in the old location, and where you should start writing to in the new location.
DB 2将数据写在512字节(HP - UX上是1024)的偏移位置上，这就是开始复制或者写入数据的位置。
The first is the input array (data), and the second is an offset into the byte array.
第一个是输入数组（ data），第二个是字节数组中的偏移。
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