необработанное SqlException

Question

Я получаю эту ошибку:

Incorrect syntax near the keyword 'INNER'. The label 'Count' has already been declared. Label names must be unique within a query batch or stored procedure.

мой запрос:

SELECT MAX(PatDiseasTreatment_tbl.improvement_rate) disease_tbl INNER 
JOIN PatDiseasTreatment_tbl ON disease_tbl.disease_id = 
PatDiseasTreatment_tbl.disease_id INNER JOIN patient_tbl ON 
PatDiseasTreatment_tbl.patient_id = patient_tbl.patient_id INNER JOIN 
treatment_tbl ON PatDiseasTreatment_tbl.treatment_id = 
treatment_tbl.treatment_id WHERE disease_tbl.MDdisease_name = " + 
comboBox2 + " AND patient_tbl.age = " + comboBox1; 

Я не знаю, что это ошибка и как ее решить.

Answer 1

Правильного форматирование ваш друг:

SELECT MAX(PatDiseasTreatment_tbl.improvement_rate) 
FROM disease_tbl 
INNER JOIN PatDiseasTreatment_tbl ON disease_tbl.disease_id = 
    PatDiseasTreatment_tbl.disease_id 
INNER JOIN patient_tbl ON 
    PatDiseasTreatment_tbl.patient_id = patient_tbl.patient_id 
INNER JOIN treatment_tbl ON PatDiseasTreatment_tbl.treatment_id = 
    treatment_tbl.treatment_id 
WHERE disease_tbl.MDdisease_name = " + 
comboBox2 + " AND patient_tbl.age = " + comboBox1; 

, которого не имеет "ОТ"

Answer 2

Попробуйте

SELECT MAX(PatDiseasTreatment_tbl.improvement_rate) 
FROM disease_tbl 
INNER JOIN PatDiseasTreatment_tbl ON disease_tbl.disease_id = 
    PatDiseasTreatment_tbl.disease_id 
INNER JOIN patient_tbl ON 
    PatDiseasTreatment_tbl.patient_id = patient_tbl.patient_id 
INNER JOIN treatment_tbl ON PatDiseasTreatment_tbl.treatment_id = 
    treatment_tbl.treatment_id 
WHERE disease_tbl.MDdisease_name = " + 
comboBox2 + " AND patient_tbl.age = " + comboBox1; 

Answer 3

певце необходимо упомянуть из пункта в вашем отборном заявлении.

 
SELECT MAX(PatDiseasTreatment_tbl.improvement_rate) disease_tbl FROM 'YOUR_TABLE_NAME) 
INNER JOIN PatDiseasTreatment_tbl ON disease_tbl.disease_id =PatDiseasTreatment_tbl.disease_id INNER JOIN patient_tbl ON PatDiseasTreatment_tbl.patient_id = patient_tbl.patient_id INNER JOIN treatment_tbl ON PatDiseasTreatment_tbl.treatment_id =treatment_tbl.treatment_id WHERE disease_tbl.MDdisease_name = " + comboBox2 + " AND patient_tbl.age = " + comboBox1;