你那樣寫應該可以啊... 請問是出現什麼錯誤訊息嗎?
SELECT *,
REPLACE(RTRIM(
CASE WHEN A = 'Y' THEN 'A ' ELSE '' END +
CASE WHEN B = 'Y' THEN 'B ' ELSE '' END +
CASE WHEN C = 'Y' THEN 'C ' ELSE '' END +
CASE WHEN D = 'Y' THEN 'D ' ELSE '' END
), ' ', '+') AS [CHECK]
FROM YourTableName
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