一个Oracle的数据类型可以映射到许多DB2的数据类型中。它会根据数据而选择合适的数据类型来进行匹配。在这里会用一个整型或者实数来存储浮点数吗？并且，这里要注意精度。另一个需要注意的事项是空间的使用方法。对于每个DB2的空间使用方法，可以根据类型的声明而改变：Smallint使用2个字节，Integer使用4个字节，Bigint使用8个字节。对于Oracle数据类型的空间使用方法要依靠声明中的参数。对于默认精度38的数字可以使用20字节的存储空间。映射Number到Smallint。比如，可以在每块中节省18字节的空间。-An Oracle data types can be mapped to a number of DB2 data types. It is based on the data and select the appropriate data type to be matched. Here will use an integer or floating point real number to store it? And, here to note accuracy. Another area that needs attention is the use of space. For each DB2 space usage can vary according to the type of declaration: Smallint use two bytes, Integer using 4 bytes, Bigint using 8 bytes. For Oracle data type methods rely on space usage statement parameters. For the default precision 38 numbers you can use 20 bytes of storage space. Number mapped to Smallint. For instance, each block can save 18 bytes.