数据库统计相关

--路灯id和它的所有设备统计
SELECT
	*
FROM
	(
		SELECT
			cfg_object_device.object_id AS lampId,
			COUNT (*) AS lampSubDevcCount
		FROM
			cfg_object_device
		GROUP BY
			cfg_object_device.object_id
	) AS t1


-----------------------------------------------------------------------------------------------
--路灯id及其告警设备数
SELECT
	t3.object_type AS lampId,
	COUNT (*) AS lampSubDevcAlarmNum
FROM
	(
		SELECT
			t1.object_type
		FROM
			cfg_object_device AS t1,
			(
				SELECT
					alarm_objectid AS b1,
					COUNT (*) AS b2
				FROM
					his_alarm
				WHERE
					his_alarm.status <= 2
				GROUP BY
					alarm_objectid
			) AS t2
		WHERE
			t1.object_id = t2.b1
	) AS t3
GROUP BY
	t3.object_type

-----------------------------------------------------------------------------------------------
SELECT
	alarm_objectid AS a1,
	COUNT (*) AS a2
FROM
	his_alarm
WHERE
	his_alarm.status <= 2
GROUP BY
	alarm_objectid

　　

SELECT
    tt1.Lamp_pole_oid,
    tt1.lampSubDevcCount,
    CASE
    WHEN tt2.lampSubDevcAlarmNum IS NULL THEN
        0
    ELSE
        tt2.lampSubDevcAlarmNum
    END
FROM
    (
        SELECT
            Streetlamp_Relation.Lamp_pole_oid,
            COUNT (*) AS lampSubDevcCount
        FROM
            Streetlamp_Relation
        GROUP BY
            Streetlamp_Relation.Lamp_pole_oid
    ) AS tt1
LEFT JOIN (
    SELECT
        t3.Lamp_pole_oid AS lampId,
        COUNT (*) AS lampSubDevcAlarmNum
    FROM
        (
            SELECT
                t1.Lamp_pole_oid
            FROM
                Streetlamp_Relation AS t1,
                (
                    SELECT
                        alarm_objectid AS b1,
                        COUNT (*) AS b2
                    FROM
                        his_alarm
                    WHERE
                        his_alarm.status <= 2
                    GROUP BY
                        alarm_objectid
                ) AS t2
            WHERE
                t1.device_obj_id = t2.b1
        ) AS t3
    GROUP BY
        t3.Lamp_pole_oid
) AS tt2 ON tt1.Lamp_pole_oid = tt2.lampId

SELECT
    table1.Lamp_id,
    table1.All_count,
    table1.Sub_count,
  (Sub_count*1.0)/All_count AS The_value,
    状态 = CASE WHEN Sub_count*1.0/All_count = 0 THEN
            '正常'
        WHEN Sub_count*1.0/All_count < 0.4 THEN
            '普通'
        WHEN Sub_count*1.0/All_count < 0.7 THEN
            '紧急'
    WHEN Sub_count*1.0/All_count <= 1 THEN
            '严重'
        END
FROM
    (
        SELECT
            tt1.Lamp_pole_oid AS Lamp_id,
            tt1.lampSubDevcCount AS All_count,
            CASE
        WHEN tt2.lampSubDevcAlarmNum IS NULL THEN
            0
        ELSE
            tt2.lampSubDevcAlarmNum
        END AS Sub_count
        FROM
            (
                SELECT
                    Streetlamp_Relation.Lamp_pole_oid,
                    COUNT (*) AS lampSubDevcCount
                FROM
                    Streetlamp_Relation
                GROUP BY
                    Streetlamp_Relation.Lamp_pole_oid
            ) AS tt1
        LEFT JOIN (
            SELECT
                t3.Lamp_pole_oid AS lampId,
                COUNT (*) AS lampSubDevcAlarmNum
            FROM
                (
                    SELECT
                        t1.Lamp_pole_oid
                    FROM
                        Streetlamp_Relation AS t1,
                        (
                            SELECT
                                alarm_objectid AS b1,
                                COUNT (*) AS b2
                            FROM
                                his_alarm
                            WHERE
                                his_alarm.status <= 2
                            GROUP BY
                                alarm_objectid
                        ) AS t2
                    WHERE
                        t1.device_obj_id = t2.b1
                ) AS t3
            GROUP BY
                t3.Lamp_pole_oid
        ) AS tt2 ON tt1.Lamp_pole_oid = tt2.lampId
    ) AS table1

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