Question

SQL怎么截取小数点前的数字，但是不要四舍五入

Answer 1

其实，你说的截取小数点前的数字，也就是将小数转换为整数。

可以使用函数【cast】进行转换

示例：将1234.9678转为整数

select cast(1234.9678 as int)

输出结果为：1234

Answer 2

round(3.45) >>>>>3.5 4舍5入
ceil(3.45)>>>>>>4 最接近的较大整数（ceiling天花板的意思）
floor(3.45)>>>>>>3 最接近的较小整数（floor地板的意思）

Answer 3

trunc(125.815) would return 125

trunc(125.815, 0) would return 125

trunc(125.815, 1) would return 125.8

trunc(125.815, 2) would return 125.81

trunc(125.815, 3) would return 125.815

trunc(-125.815, 2) would return -125.81

trunc(125.815, -1) would return 120

trunc(125.815, -2) would return 100

trunc(125.815, -3) would return 0

Answer 4

substring(ID,1,(charindex('.',ID)-1)

从ID第一位开始截取 到 ‘.’前面的值

Answer 5

round（数值，位数，截取1如四射五入默认0或不填）