亦称字模库。
But most simple databases don't require the full range of allowed types, and often they need to store only numerical, character, and date or time data.
但是最简单的数据库并不要求使用所有允许的类型,通常只需要保存数值型、字符型和日期(或时间)数据。
In addition to numerical data, the other most popular type of data to store in a database is character data.
除了数值类型,数据库中最常用的保存数据的另一个类型是字符数据。
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