mysql 统计某时间段内每天的总数

 SELECT FROM_UNIXTIME(addtime,'%Y-%m-%d'),count(*) as count FROM agent 
  WHERE addtime BETWEEN 1515893709 AND 1516008205
  GROUP BY FROM_UNIXTIME(addtime,'%Y%m%d')
  ORDER BY addtime


 SELECT FROM_UNIXTIME(addtime,'%Y-%m-%d'),count(*) as count FROM agent 
  WHERE addtime BETWEEN UNIX_TIMESTAMP('2018-1-1 00:00:00') AND UNIX_TIMESTAMP('2018-1-31 23:59:59')
  GROUP BY FROM_UNIXTIME(addtime,'%Y%m%d')
  ORDER BY addtime


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