如果計數爲0,如何返回0作爲與PossibleAnswerText響應?現在它不會返回任何東西。返回0與SQL查詢而不是什麼
select
COUNT(sr.Id) AS 'Responses', qpa.PossibleAnswerText
from
CaresPlusParticipantSurvey.QuestionPossibleAnswer as qpa
join
CaresPlusParticipantSurvey.SurveyResponse as sr on sr.QuestionPossibleAnswerId = qpa.Id
where
sr.QuestionPossibleAnswerId = 116
GROUP BY
qpa.PossibleAnswerText
如果它什麼都沒有返回,那麼sr.QuestionPossibleAnswerID = 116 –
沒有記錄使用left join ?. –
左連接沒有工作,已經試過了。我知道沒有記錄,這就是爲什麼我想顯示0. – user1202606