mysql 将指定列的浮点数转化为整数:
update A set B = cast(B as decimal(10,0)) -- 或者update A set B = round(B,0)
例如:update hdcloude01.t_a01_eltable set t_a01_eltable.BatteryDal = round(t_a01_eltable.BatteryDal, 0) where t_a01_eltable.`BatteryDal` is not null;
原文：http://www.cnblogs.com/jym-sunshine/p/5483078.html