This is due to the encoding of the group information in the binary string, and a grouping parameter of type VARCHAR requires potentially more space than a simple INTEGER value.

这是将分组信息编码到二进制串中的缘故，分组参数类型为VARCHAR，比简单的INTEGER类型潜在地要求更多的存储空间。

youdao

This binary string is comprised of the usual counter, which is needed for the DB2 MAX function to do the actual aggregation, the identifier for the aggregate object, and the group identifier.

这个二进制串由常用的计数器(DB 2 max函数进行实际聚集计算时需要)、聚集对象的标识以及分组标识构成。

youdao

By using various coding techniques, group of bits can be made to represent not only binary number but also other discrete symbols, such as decimal digits or letter of alphabet.

通过应用各种编码技术，字位的组合不但可以用来表示二进制数，还可以表示其他离散符号，比如十进制数字和字母表上的字母等。

youdao

Any binary division of the sample period will show one group performing better than the other.

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