如果您要寻找一个常数，stb和xiowl的建议就很好。如果需要使用现有的整数字段或参数，则可以将它们首先转换为浮点数：

The suggestions from stb and xiowl are fine if you're looking for a constant. If you need to use existing fields or parameters which are integers, you can cast them to be floats first:

SELECT CAST(1 AS float) / CAST(3 AS float)

或

SELECT CAST(MyIntField1 AS float) / CAST(MyIntField2 AS float)