数值数据类型的小数位数是小数点右侧的位数。

The scale of a numeric data type is the number of digits to the right of the decimal point.

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如果值为varchar类型或数值数据类型(可以转换为varchar类型)，则结果类型是VARCHAR。

If the values are of type VARCHAR or a numerical data type, which can be converted to type VARCHAR, the resulting type is VARCHAR.

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无论数据类型是数值类型还是引用类型，信息传递的一方都可能出现问题。

Whether a data type is a value type or a reference type, the communicating parties could also pose problems.

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