NVL, DECODE, and BITAND are directly mapped to the DB2 database product built-in functions.

DECODE和BITAND 被直接映射到DB2数据库产品内置函数。

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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。

youdao

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。

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