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请帮帮我,怎么下面的SQL查询转换为LINQ的声明在vb.netSQL多列小组通过,以便通过对LINQ的
select distinct PATIENT_DIAGNOSIS_DESCRIPTION, PATIENT_DIAGNOSIS_CODE,
PATIENT_DIAGNOSIS_ACCOUNT,PATIENT_DIAGNOSES_STATUS
from MF_PATIENT_DIAGNOSES
where PATIENT_DIAGNOSIS_ACCOUNT= '31'
AND UPPER(PATIENT_DIAGNOSES_STATUS) <> 'ENTRY ERROR'
GROUP BY PATIENT_DIAGNOSIS_DESCRIPTION, PATIENT_DIAGNOSIS_CODE,
PATIENT_DIAGNOSIS_ACCOUNT,PATIENT_DIAGNOSES_STATUS
ORDER BY PATIENT_DIAGNOSIS_DESCRIPTION