nvl
- 网络空值转换函数
nvl-
In this paper , the construction style , the developing pattern and the realization technology of physical chemistry NVL have been brought forward on the basis of the thorough researching VL theory and developing technology .
本论文在深入研究虚拟实验室理论及其开发技术的基础上，确定了物理化学网络虚拟实验室的构建类型、开发模式和实现技术。
-
For example , a utility class function called NVL would return NVL if the database connection is with Oracle , and COALESCE if the DB connection is with DB2 .
例如，如果连接的是Oracle数据库，那么名为NVL的实用程序类函数返回NVL；如果连接的是DB2，那么返回COALESCE。