还有这么到的？？？2015-09-01到2014-09-12
select date,count(*) as number from table_name where date = '2015-09-01'
union
select date,count(*) as number from table_name where date = '2015-09-02'
如果天数比较少 可以这么干，如果比较多可以写存储过程，循环搞
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