Question

我有一个表medicalclaims，其中包含几列感兴趣的列：patient_id，vendor，claim_id，diagnosis_code，procedure_code，和state。

简而言之，我想提取patient_id的总数和claim_id的总数，但我也想检查某些diagnosis_code，{{1 }}和procedure_code。例如，我希望我的输出列看起来像这样：

state

当前，我正在使用此查询来查询供应商，patient_id计数和Claim_id计数：

vender | count(distinct patient_id) | count (distinct claim_id) | procedure_code = E123 | state = CA

但是，我不确定如何建立其余的列来捕获特定的SELECT distinct vendor, count (distinct patient_id) AS Patients, count (distinct claim_id) AS Claims FROM medicalclaims GROUP BY 1 ORDER BY 1，diagnosis_code和procedure_code感兴趣的值。我想提取CA或NY患者的总数以及特定的诊断代码或程序代码的总和。因此，基本上在输出中添加如下所示的列：

state

和

SELECT count(distinct patient_id)
FROM medicalclaims
WHERE state = 'CA'

Answer 1

我想你想要

SELECT vendor, count(distinct patient_id) AS Patients,
       count(distinct claim_id) AS Claims,
       sum(case when procedure_code = 'xyz' then 1 else 0 end) as procedure_xyz,
       sum(case when state = 'xyz' then 1 else 0 end) as state_ca
FROM medicalclaims
GROUP BY 1
ORDER BY 1

如何创建满足特定条件的总和的输出

1 个答案: