delete top(1) from Tb_PaintOut where PaintNumber = (select top (1) PaintNumber from Tb_PaintOut order by PaintOutTime desc)
Tb_PaintOut：表明
PaintNumber：字段名
PaintOutTime：时间类型字段
MSSQL - 根据时间倒序删除第一行数据
原文：http://www.cnblogs.com/KTblog/p/4595284.html
