select kehe,s_time,alter_time,p_weight from total select SUM(p_weight) AS 本期加工 from total where s_time<'2007-01-20'
group by keheSELECT SUM(p_weight) AS 本期加工 from total where s_time>'2007-01-20'
group by kehe
group by keheSELECT SUM(p_weight) AS 本期加工 from total where s_time>'2007-01-20'
group by kehe
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