同一张表中可能存在多辆车的皮重记录,想更新最早的一条记录,即更新其皮重。在sqlite3中,如下:
update CarNoTable set TareWeight ='9080' - where CarNO='京A6390' and TareWeight = - (select TareWeight from CarNoTable where CarNo='京A6390' - order by TareTime limit 0,5 )
CarNoTable:表
TareWeight:皮重字段
CarNo:车号
TareTime:皮重时间