用两个mysql函数

FROM_UNIXTIME( ordertime )将日期格式转换成时间戳

month( FROM_UNIXTIME( ordertime ) ) 获取当前日期的月

select month( FROM_UNIXTIME( ordertime ) ) , count( commodity_id )
FROM `order_info`
WHERE FROM_UNIXTIME( ordertime )
BETWEEN ‘2014-01-01‘
AND ‘2014-12-31‘
AND providerid =7
GROUP BY month( FROM_UNIXTIME( ordertime ) )
LIMIT 0 , 30


获取某商家当前每个月销量sql语句。