求大神帮忙优化下saql，在线等

SELECT
SN,
IP,
sum(IF(type = 1, count, 0)) AS BS_COUNT,
sum(IF(type = 2, count, 0)) AS BS_EXT_COUNT
FROM
(
SELECT
c.SN,
c.IP,
COUNT(b.FN_SN) count,
1 AS TYPE
FROM
cc c
LEFT JOIN runtime_station b ON c.SID = b.CC_SID
WHERE
c.SN = 201705110003
GROUP BY
c.SN,
c.IP
UNION
SELECT
d.SN,
d.IP,
COUNT(r.SN) count,
2 AS TYPE
FROM
cc d
LEFT JOIN base_radar r ON d.SID = r.CC_SID
WHERE
d.SN = 201705110003
GROUP BY
d.SN,
d.IP
) ccinfo
GROUP BY
SN,
IP

减少函数使用，减少连表查询