摘要: 1.取整(大) select ceil(-1.001) value from dual2.取整(小) select floor(-1.001) value from dual3.取整(截取) select trunc(-1.002) value from dual 4.取整(舍入) select r 阅读全文
posted @ 2017-06-03 16:29 忧郁香蕉 阅读(961) 评论(0) 推荐(0)