營銷雲中的SQL查詢錯誤

Question

SELECT A.EmailAddress, 
case when A.RegisteredProduct1 = 'Yes' then 'Yes' 
end  B.RegisteredProduct1 
FROM WebinarMasterDE B 
Join WebResponseDe A ON A.EmailAddress = B.EmailAddress 

當我試圖在營銷雲中運行此SQL查詢時，它給了我錯誤'。'附近的語法錯誤。無法弄清楚這個決議。

Answer 1

從別名

SELECT A.EmailAddress, 
case when A.RegisteredProduct1 = 'Yes' then 'Yes' 
end RegisteredProduct1 --Remove the B. from here as it is an alias name 
FROM WebinarMasterDE B 
Join WebResponseDe A ON A.EmailAddress = B.EmailAddress 

Answer 2

我相信你需要得到正確的case-when刪除B.。這是正確的case-when：

case when A.RegisteredProduct1 = 'Yes' then 'Yes' else B.RegisteredProduct1 end 

這是你所需要的查詢：

SELECT A.EmailAddress, 
case when A.RegisteredProduct1 = 'Yes' then 'Yes' else B.RegisteredProduct1 end 
FROM WebinarMasterDE B 
Join WebResponseDe A ON A.EmailAddress = B.EmailAddress 

然而，最簡單的語法層面的解決辦法是增加一個缺少的逗號：

SELECT A.EmailAddress, 
case when A.RegisteredProduct1 = 'Yes' then 'Yes' 
end, -- this is it, the missing comma 
    B.RegisteredProduct1 -- this is a new column 
FROM WebinarMasterDE B 
Join WebResponseDe A ON A.EmailAddress = B.EmailAddress