? ?browse_second_num, ? ? ?count(browse_second_num) launch_num, ? ? ?case ? ? ? ? ?when browse_second_num <![CDATA[ < ]]> 10 then '&lt;10秒' ? ? ? ? ?when browse_second_num <![CDATA[ >= ]]> 10 and browse_second_num <![CDATA[ <= ]]> 30 then '10秒-30秒' ? ? ? ? ?when browse_second_num <![CDATA[ >= ]]> 31 and browse_second_num <![CDATA[ <= ]]> 60 then '31秒-2分' ? ? ? ? ?else '>2分' ? ? ?end browse_second_type