salary列的数据类型为DECIMAL(长度为9，小数点后位数为2)。

The SALARY column is data type DECIMAL (9 length, 2 scale).

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BONUS列的数据类型为DECIMAL（长度为9，小数点后位数为2）。

The BONUS column is data type DECIMAL (9 length , 2 scale).

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Precision是指小数点左右的总位数。

Precision is the total number of digits both left and right of the decimal.

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尽管小数点的位数很小，但是它是很关键的。

Although the decimal point is little, it's a big deal to the whole.

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此命令所指定的值的小数点后超过3位数。

The value given by the command specifies more than 3 digits after the decimal point.

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此命令所指定的值的小数点后超过3位数。

The value given by the command specifies more than 3 digits after the decimal point.

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