SQL Server获取指定行(如第二行)的数据 --SQL Server获取指定行(如第二行)的数据-- --法一(对象法)-- select * from ( select * , number = row_number() over(order by Grade desc) from Students ) m where number = 2 --法二(排除法)--- select top 1 * from Students where Grade not in ( select
str要截取的字符 n截取个数 function jiequ(str,n) { var strArr = []; for (var i = 0, l = str.length; i < l / n; i++) { var a = str.slice(n * i, n * (i + 1)); strArr.push(a); } return strAr