SQL - 92包括DECIMAL数据类型，它是用于表示定点小数的精确数字类型，它可以对小数进行基本的算术运算。

SQL-92 includes a decimal data type, which is an exact numeric type for representing fixed point decimal Numbers and performs basic arithmetic operation on decimal Numbers.

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由于所有字符数据都是字符串，因此Net . Data将使用内置函数来对表示有效数字(包括用指数形式表示的数字)的字符串执行算术运算。

Because all character data is a string, Net.Data USES built-in function to perform arithmetic operations on a string that represents a valid number, including those in exponential formats.

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通常的经验是，在Android设备中，浮点数会比整型慢两倍，在缺少FPU和JIT的G1上对比有FPU和JIT的Nexus One中确实如此（两种设备间算术运算的绝对速度差大约是10倍）

This is true on a FPU-less, JIT-less G1 and a Nexus One with an FPU and the JIT. (Of course, absolute speed difference between those two devices is about 10x for arithmetic operations.)

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