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SELECT DISTINCT c.uid, count( 1 ) AS zongji, count( if( task_type = ‘mobile‘, true, NULL ) ) AS mobile, count( if( task_type = ‘computer‘, true, NULL ) ) AS computer FROM keke_witkey_task_work AS c WHERE c.op_status >0 AND c.free_price >3 AND c.work_time >= ‘1460176800‘ AND c.work_time <= ‘1460736000‘ GROUP BY c.uid ORDER BY mobile DESC LIMIT 30
uid(用户ID)
task_type(任务类型（a,b,c,d）)
需求是：按时间段，等要求，统计出每个用户 各任务类型的记录数
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原文地址：http://www.cnblogs.com/ycookie/p/5398962.html
