请帮我在查询中查找计数。我使用“having”和“group by”收到错误。
我已修改我的代码，如下所示，以查找类似的事件计数。我希望根据2个字段（user_id，item_id）找到计数
SELECT
i.usr_id,
COUNT(DISTINCT CASE WHEN inc_data.Rep3 = 'y' THEN 1 END) AS RespBreach,
COUNT(DISTINCT CASE WHEN inc_data.Res3 = 'y' THEN 1 END) AS ResBreach,
COUNT(DISTINCT i.incident_id) as CallCount,
SUM(CASE WHEN act1.act_type= 'TRAVEL' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Travel_Time,
SUM(CASE WHEN act1.act_type= 'REMOTE' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Remote_Time,
(SELECT
COUNT(inc.incident_id) AS similar_inc_count,
inc.item_id, inc.cust_id
FROM
incident inc
GROUP BY
inc.usr_id, inc.item_id
HAVING
(COUNT(inc.incident_id) > 1)) AS similar_Call
FROM
incidents AS i
INNER JOIN
inc_data ON i.incident_id = inc_data.incident_id
INNER JOIN
actions act1 ON i.incident_id = act1.incident_id
WHERE
i.date_logged BETWEEN '2016-08-20' AND '2016-08-23'
GROUP BY
i.usr_id
预期结果：
| user_id | RespBreach | ResBreach | CallCount | Travel_Time | Remote_Time | Similer_call |
+---------+------------+-----------+-----------+-------------+-------------+--------------+
| 111 | 1 | 1 | 2 | 140 | 50 | 0 |
| 190 | 1 | 0 | 2 | 75 | 60 | 1 |
+---------+------------+-----------+-----------+-------------+-------------+--------------+
示例数据：
CREATE TABLE incidents (incident_id int,date_logged datetime,usr_id int,dept_id int,item_id int, cust_id int)
insert into incidents values
('1001', '8/20/2016', '190', '3', '800', '10'),
('1002', '8/21/2016', '111', '4', '810', '12'),
('1003', '8/22/2016', '190', '3', '800', '10'),
('1004', '8/23/2016', '111', '4', '822', '12')
Create TABLE actions ( act_id int, act_type varchar(50) , incident_id int, usr_id int ,date_actioned datetime, service_time money)
Insert into actions VALUES
('1', 'TRAVEL', 1001, 190, 8/20/2016, 20),
('2', 'ASSIGN', 1001, 2, 8/21/2016, 1),
('3', 'TRAVEL', 1001, 190 ,8/22/2016, 10),
('4', 'REMOTE', 1001, 190, 8/23/2016, 30),
('5', 'TRAVEL', 1002, 111, 8/21/2016, 40),
('6', 'ASSIGN', 1002, 2, 8/22/2016 ,1),
('7', 'REMOTE', 1002, 111, 8/23/2016, 30),
('8', 'TRAVEL', 1002, 111, 8/24/2016, 60),
('9', 'TRAVEL', 1003, 190, 8/22/2016, 45),
('10', 'ASSIGN', 1003, 2, 8/23/2016 ,1),
('11', 'REMOTE', 1003, 190 ,8/23/2016 ,10),
('12', 'REMOTE', 1003, 190 ,8/23/2016 ,20),
('13', 'ASSIGN', 1004, 2 ,8/23/2016 ,1),
('14', 'TRAVEL', 1004, 111, 8/23/2016, 20),
('15', 'TRAVEL', 1004, 111, 8/23/2016, 20),
('16', 'REMOTE', 1004, 111, 8/23/2016, 20)
CREATE TABLE inc_data (incident_id int,Rep1 char(1), Rep2 char(1), Rep3 char(1), Res1 char(1), Res2 char(1), Res3 char(1))
insert into inc_data values
(1001, 'y', 'y', 'y', 'y', 'y', 'n'),
(1002, 'n', 'n', 'n', 'n', 'n', 'n'),
(1003, 'y', 'y', 'n', 'n', 'n', 'n'),
(1004, 'y', 'y', 'y', 'y' , 'y', 'y');
答案 0 :(得分：1)
您不能在子查询中选择多个语句。通常我们还必须在子查询中使用其父查询建立关系。
我假设您想要针对子查询中的用户提取事件数，如果是这样，您必须编写如下代码。
SELECT i.usr_id,
COUNT(DISTINCT CASE WHEN inc_data.Rep3 = 'y' THEN 1 END) AS RespBreach,
COUNT(DISTINCT CASE WHEN inc_data.Res3 = 'y' THEN 1 END) AS ResBreach,
COUNT(DISTINCT i.incident_id) as CallCount,
SUM(CASE WHEN act1.act_type= 'TRAVEL' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Travel_Time,
SUM(CASE WHEN act1.act_type= 'REMOTE' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Remote_Time,
ISNULL((SELECT COUNT(inc.incident_id) -1
FROM incidents inc
WHERE inc.usr_id=i.usr_id
GROUP BY inc.usr_id,inc.item_id
HAVING COUNT(inc.incident_id) > 1
),0)AS similar_inc_count
FROM incidents as i
INNER JOIN inc_data ON i.incident_id= inc_data.incident_id
INNER JOIN actions act1 on i.incident_id=act1.incident_id
WHERE i.date_logged BETWEEN '2016-08-20' AND '2016-08-23'
GROUP BY i.usr_id
答案 1 :(得分：1)
您正在寻找相关的子查询，而不是<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:background="#ecedf1">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="@dimen/_200sdp" />
<RelativeLayout
android:id="@+id/viewPagerIndicator"
android:layout_width="match_parent"
android:layout_height="25dp"
android:layout_marginTop="@dimen/_180sdp"
android:gravity="center">
<LinearLayout
android:id="@+id/viewPagerCountDots"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:gravity="center"
android:orientation="horizontal" />
</RelativeLayout>
<com.information.aanjana.aanjanainformation.NonScrollGridView
android:id="@+id/gv_android"
android:layout_width="@dimen/_299sdp"
android:layout_height="match_parent"
android:horizontalSpacing="8dp"
android:layout_centerHorizontal="true"
android:numColumns="2"
android:paddingLeft="@dimen/_4sdp"
android:paddingRight="@dimen/_4sdp"
android:layout_marginTop="@dimen/_220sdp"
android:verticalSpacing="8dp"/>
</RelativeLayout>
</ScrollView>
<!-- Here we add the layout outside the ScrollView -->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="@dimen/_200sdp"
android:gravity="top"> <!-- GRAVITY ADJUST -->
<EditText
android:layout_width="@dimen/_280sdp"
android:layout_centerHorizontal="true"
android:layout_marginTop="@dimen/_10sdp"
android:layout_height="@dimen/_40sdp"
android:text="fdgsdfhsfhsfghhsfhsfhf"
android:background="@drawable/customedittext"/>
</RelativeLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation_view"
android:layout_height="match_parent"
android:layout_width="@dimen/_170sdp"
android:layout_gravity="start"
app:menu="@menu/drawer"
/>
</android.support.v4.widget.DrawerLayout>
。但是，您的查询还有其他改进：
group by注意：
SELECT i.usr_id,
MAX(CASE WHEN id.Rep3 = 'y' THEN 1 ELSE 0 END) AS RespBreach,
MAX(CASE WHEN id.Res3 = 'y' THEN 1 ELSE 0 END) AS ResBreach,
COUNT(DISTINCT i.incident_id) as CallCount,
SUM(CASE WHEN a.act_type = 'TRAVEL'
THEN a.service_time
ELSE 0
END) AS Travel_Time,
SUM(CASE WHEN a.act_type = 'REMOTE'
THEN a.service_time
ELSE 0
END) AS Remote_Time,
(SELECT COUNT(*) AS similar_inc_count
FROM (SELECT inc.item_id
FROM incident inc
WHERE inc.cust_id = i.user_id
GROUP BY inc.item_id
HAVING COUNT(inc.incident_id) > 1)
) inc
) AS similar_Call
FROM incidents i INNER JOIN
inc_data id
ON i.incident_id = id.incident_id INNER JOIN
actions a
ON i.incident_id = a.incident_id
WHERE i.date_logged BETWEEN '2016-08-20' AND '2016-08-23'
GROUP BY i.usr_id;
已被COUNT(DISTINCT)取代。 MAX()更容易理解，也更有效率。MAX()已从IFNULL()中删除，以简化逻辑。答案 2 :(得分：0)
试试这个：
SELECT i.usr_id,
COUNT(DISTINCT CASE WHEN inc_data.Rep3 = 'y' THEN 1 END) AS RespBreach,
COUNT(DISTINCT CASE WHEN inc_data.Res3 = 'y' THEN 1 END) AS ResBreach,
COUNT(DISTINCT i.incident_id) as CallCount,
SUM(CASE WHEN act1.act_type= 'TRAVEL' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Travel_Time,
SUM(CASE WHEN act1.act_type= 'REMOTE' THEN ISNULL(act1.service_time, 0) ELSE 0 END) AS Remote_Time,
(SELECT COUNT(inc.incident_id)
FROM incidents inc
GROUP BY inc.usr_id, inc.item_id
HAVING COUNT(inc.incident_id) > 1) AS similar_Call
FROM incidents as i
INNER JOIN inc_data ON i.incident_id= inc_data.incident_id
INNER JOIN actions act1 on i.incident_id=act1.incident_id
WHERE i.date_logged BETWEEN '2016-08-20' AND '2016-08-23'
GROUP BY i.usr_id