如果您正在寻找常量，stb 和 xiowl 的建议很好.如果您需要使用现有的整数字段或参数，您可以先将它们转换为浮点数:

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)