数据库中关于备注型字段的操作

Operation of Memo Field in Database

在数据库操作中,对数据采取了多种类型进行描述,但在具体处理某些数据项时,如不定长、不规则或属性不确定的数据时,会出现不便处理和管理的情况,而此时若采用备注型宇段进行描述则非常的方便和实用。

There are many data types to describe data. But in handling some data item, such as irregular items or indefinite attribution, it is incommodious to describe these items with character field. Contrariwise, describing with memo field instead is very convenient and practical.