在数据库中有时我们可能需要对一些数据进行处理，例如四舍五入、直接舍去后面的几位等，其实很简单，都是有现成的函数，我们只需要套用就行了： select round(10.98*10)/10 from dual;--四舍五入 select ceil(10.63*10)/10 from dual;--取上限值 select floor(10.68*10)/10 from dual;--取下限值
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