If you've never encountered an exact precision data type, the distinction between a decimal and floating-point type may be confusing.
如果从未遇到过准确精度数据类型，那么对算术类型和浮点类型可能有些迷惑。
The storage required for a DECIMAL data type is potentially much larger than it is for a normal floating-point data type.
DECIMAL数据类型需要的存储空间通常要比浮点数据类型大得多。
The storage required for a DECIMAL data type is potentially much larger than it is for a normal floating-point data type.
DECIMAL数据类型需要的存储空间通常要比浮点数据类型大得多。
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