例如，如果COL1是一个长度为1的字符列，像COL1 BETWEEN ' 2 ' AND ' 4 '的一个谓词可能被重写为COL1 IN (' 2 '，' 3 '，' 4 ')。

For example, if COL1 is a character column of length one, a predicate like COL1 BETWEEN '2' AND '4' could be rewritten as COL1 IN (' 2 ', '3', '4').

youdao

一些应用程序创建只包含字符数据类型的列的表。

Some applications create tables with columns of character data type only.

youdao

包含客户类型作为字符的列。

A column that contains the customer type as characters.

youdao