SQL Server:选择只有一个条件的ID_Sql_Sql Server_Notin

SQL Server:选择只有一个条件的ID

sql sql-server

SQL Server:选择只有一个条件的ID,sql,sql-server,notin,Sql,Sql Server,Notin,我有一张患者表，上面有患者的病情等详细信息。我想从下表中选择患者，他们声称只有一种情况——“高血压”。示例患者B是预期输出。患者A不会被选中，因为他声称患有多种疾病 +----+---------+--------------+ | ID | ClaimID | Condition | +----+---------+--------------+ | A | 14234 | Hypertension | | A | 14234 | Diabetes | | A |

我有一张患者表，上面有患者的病情等详细信息。我想从下表中选择患者，他们声称只有一种情况——“高血压”。示例患者B是预期输出。患者A不会被选中，因为他声称患有多种疾病

+----+---------+--------------+
| ID | ClaimID |  Condition   |
+----+---------+--------------+
| A  |   14234 | Hypertension |
| A  |   14234 | Diabetes     |
| A  |   63947 | Diabetes     |
| B  |   23853 | Hypertension |
+----+---------+--------------+

我试着使用下面的“不在条件下”，但似乎没有帮助

SELECT ID, ClaimID, Condition 
FROM myTable 
WHERE Condition IN ('Hypertension') 
  AND Condition NOT IN ('Diabetes')

一种方法不存在：

你可以用CTE来做这件事

我用两个参数设置了这个CTE，一个是您要寻找的条件，另一个是在案例1中要找到的最大组合条件数

DECLARE @myTable TABLE (Id VARCHAR(1), ClaimID INT, Condition VARCHAR(100))
INSERT INTO @myTable (Id, ClaimID, Condition)
SELECT 'A',14234,'Hypertension' UNION ALL
SELECT 'A',14234,'Diabetes' UNION ALL
SELECT 'A',63947,'Diabetes' UNION ALL
SELECT 'B',23853,'Hypertension'

DECLARE @Condition VARCHAR(100)
DECLARE @MaxConditions TINYINT

SET @Condition='Hypertension'
SET @MaxConditions=1

; WITH CTE AS
(
    SELECT *, COUNT(2) OVER(PARTITION BY ClaimID) AS CN
    FROM @myTable T1
    WHERE EXISTS (SELECT 1 FROM @myTable T2 WHERE T1.ClaimID=T2.ClaimID AND T2.Condition=@Condition)
)

SELECT *
FROM CTE
WHERE CN<=@MaxConditions

如果您不关心绒毛，只希望所有ClaimID都只有一个条件，而不管它是哪种条件，请使用此选项

DECLARE @myTable TABLE (Id VARCHAR(1), ClaimID INT, Condition VARCHAR(100))
INSERT INTO @myTable (Id, ClaimID, Condition)
SELECT 'A',14234,'Hypertension' UNION ALL
SELECT 'A',14234,'Diabetes' UNION ALL
SELECT 'A',63947,'Diabetes' UNION ALL
SELECT 'B',23853,'Hypertension'

DECLARE @MaxConditions TINYINT

SET @MaxConditions=1

; WITH CTE AS
(
    SELECT *, COUNT(2) OVER(PARTITION BY ClaimID) AS CN
    FROM @myTable T1
)

SELECT *
FROM CTE
WHERE CN<=@MaxConditions

你可以用CTE来做这件事

我用两个参数设置了这个CTE，一个是您要寻找的条件，另一个是在案例1中要找到的最大组合条件数

DECLARE @myTable TABLE (Id VARCHAR(1), ClaimID INT, Condition VARCHAR(100))
INSERT INTO @myTable (Id, ClaimID, Condition)
SELECT 'A',14234,'Hypertension' UNION ALL
SELECT 'A',14234,'Diabetes' UNION ALL
SELECT 'A',63947,'Diabetes' UNION ALL
SELECT 'B',23853,'Hypertension'

DECLARE @Condition VARCHAR(100)
DECLARE @MaxConditions TINYINT

SET @Condition='Hypertension'
SET @MaxConditions=1

; WITH CTE AS
(
    SELECT *, COUNT(2) OVER(PARTITION BY ClaimID) AS CN
    FROM @myTable T1
    WHERE EXISTS (SELECT 1 FROM @myTable T2 WHERE T1.ClaimID=T2.ClaimID AND T2.Condition=@Condition)
)

SELECT *
FROM CTE
WHERE CN<=@MaxConditions

如果您不关心绒毛，只希望所有ClaimID都只有一个条件，而不管它是哪种条件，请使用此选项

DECLARE @myTable TABLE (Id VARCHAR(1), ClaimID INT, Condition VARCHAR(100))
INSERT INTO @myTable (Id, ClaimID, Condition)
SELECT 'A',14234,'Hypertension' UNION ALL
SELECT 'A',14234,'Diabetes' UNION ALL
SELECT 'A',63947,'Diabetes' UNION ALL
SELECT 'B',23853,'Hypertension'

DECLARE @MaxConditions TINYINT

SET @MaxConditions=1

; WITH CTE AS
(
    SELECT *, COUNT(2) OVER(PARTITION BY ClaimID) AS CN
    FROM @myTable T1
)

SELECT *
FROM CTE
WHERE CN<=@MaxConditions

下面是一个使用Having子句的方法

或者你可以这样做：

select 
    id,
    claim_id,
    condition
from 
    patient
where 
    id in
    (
        select
            id
        from
            patient
        group by
            id having count (distinct condition) = 1
    );

结果:

id claim_id    condition
-- ----------- ----------------
B        23853 Hypertension

(1 rows affected)

设置：

create table patient
(
    id         varchar(1),
    claim_id   int,
    condition  varchar(16)
);

insert into patient (id, claim_id, condition) values ('A', 14234, 'Hypertension');
insert into patient (id, claim_id, condition) values ('A', 14234, 'Diabetes');
insert into patient (id, claim_id, condition) values ('A', 63947, 'Diabetes');
insert into patient (id, claim_id, condition) values ('B', 23853, 'Hypertension');

或者你可以这样做：

select 
    id,
    claim_id,
    condition
from 
    patient
where 
    id in
    (
        select
            id
        from
            patient
        group by
            id having count (distinct condition) = 1
    );

结果:

id claim_id    condition
-- ----------- ----------------
B        23853 Hypertension

(1 rows affected)

设置：

create table patient
(
    id         varchar(1),
    claim_id   int,
    condition  varchar(16)
);

insert into patient (id, claim_id, condition) values ('A', 14234, 'Hypertension');
insert into patient (id, claim_id, condition) values ('A', 14234, 'Diabetes');
insert into patient (id, claim_id, condition) values ('A', 63947, 'Diabetes');
insert into patient (id, claim_id, condition) values ('B', 23853, 'Hypertension');

我决定把我的答案修改成合适的

您的问题的一个简单解决方案是计算行数，而不是ID值，因为它不是整数

以下是一个简单的介绍：

SELECT 
    ID 
FROM 
    #PatientTable 
GROUP BY 
    ID 
HAVING
    ID = ID AND COUNT(*) = 1

这将返回ID B

当然，这还不够，因为您可能需要处理大量数据并需要更多的过滤

因此，我们将使用它作为子查询

将其用作子查询很简单：

SELECT
    ID, 
    ClaimID, 
    Condition
FROM 
    #PatientTable
WHERE 
    ID = (SELECT ID AS NumberOfClaims FROM #PatientTable GROUP BY ID HAVING ID = ID AND COUNT(*) = 1)

这会回来的

+----+---------+--------------+
| ID | ClaimID |  Condition   |
+----+---------+--------------+
| B  |   23853 | Hypertension |
+----+---------+--------------+

到目前为止还不错，但我们可能会面临另一个问题。假设您有来自多个患者的多个索赔，按原样使用此查询将只显示一个患者。为了显示所有患者，我们需要在WHERE子句中使用IN而不是=来表示

WHERE 
    ID IN (SELECT ID AS NumberOfClaims FROM #PatientTable GROUP BY ID HAVING ID = ID AND COUNT(*) = 1)

这将列出所有属于这种情况的患者

如果需要更多的条件进行筛选，只需将它们添加到WHERE子句中，就可以了

我决定把我的答案修改成一个合适的答案