TSQL：如何确保一个ID有多行？

Question

我需要确保每个IncidentID都有2个特定ResponseCodes（201 AND 204）。如何识别不具有201和204的IncidentID，如下图所示？

数据集

我想在数据集中识别

所需的结果集

SQL Fiddle对我不起作用，但测试代码如下：

CREATE TABLE DIS (
IncidentID NUMERIC,
ResponseCode NUMERIC,
ResponseCodeDescription varchar(30)
)

INSERT INTO DIS (IncidentID, ResponseCode, ResponseCodeDescription)
VALUES
      ( '999888', '201', 'OSS'), 
      ( '999888', '204', 'Long Term OSS'),
      ( '888777', '201', 'OSS'),
      ( '888777', '204', 'Long Term OSS'),
      ( '777666', '204', 'Long Term OSS'),
      ( '555444', '201', 'OSS'),
      ( '555444', '204', 'Long Term OSS')

SELECT 
    IncidentID
 ,  ResponseCode
 ,  ResponseCodeDescription
FROM DIS

谢谢！

Answer 1

试试这个：

SELECT IncidentID
FROM DIS
WHERE ResponseCode IN (201,204)
GROUP BY IncidentID
HAVING COUNT(DISTINCT ResponseCode) < 2

此查询将选择IncidentID值等于ResponseCode或201的{​​{1}}值，但不能同时选择。{/ p>

Answer 2

您可以尝试使用GROUP BY和HAVING条款，如下所示：

SELECT IncidentID
FROM yourtable
WHERE ResponseCode IN (201,204)
GROUP by IncidentID
HAVING COUNT(DISTINCT IncidentID) < 2