例子：某主机下有5149个设备，设备分不同类别，设备运行会有不同状态（1-正常、2-告警、3-故障、0-离线）
sql：
SELECT t.DEVICE_TYPE_NAME,
SUM(CASE t.DEVICE_STATUS WHEN \'1\' THEN 1 ELSE 0 END) AS \'正常\',
SUM(CASE t.DEVICE_STATUS WHEN \'3\' THEN 1 ELSE 0 END) AS \'故障\',
SUM(CASE t.DEVICE_STATUS WHEN \'0\' THEN 1 ELSE 0 END) AS \'离线\',
SUM(CASE t.DEVICE_STATUS WHEN \'2\' THEN 1 ELSE 0 END) AS \'告警\'
FROM(SELECT * FROM `device_info` WHERE FIRE_SYSTEM_ID=1 and CATEGORY_ID=2 and DELETED=0 AND DIST_ID=5) t
GROUP BY t.DEVICE_TYPE_NAME
查询结果：
页面效果：