在更新查詢中使用大小寫

Question

我正在嘗試在大小寫查詢中使用大小寫，它給了我一個錯誤，說明大小寫不正確的語法。我不知道在哪裏？！這是在SQL 2005中

我正在發送日期到存儲過程。如果發送日期是'01/01/1905'，則必須保存空值，否則輸入真實日期。我真的不確定這個聲明有什麼問題。

Update Manifest set Notes = @Notes, IsCustom = @IsCustom, 
CASE WHEN @ProofSent = CONVERT(datetime, '01/01/1905') THEN NULL ELSE @ProofSent END, 
CASE WHEN @ProofApproved = CONVERT(datetime, '02/01/1905') THEN NULL ELSE @ProofApproved END 

在此先感謝！

Answer 1

它必須是某事像這樣：

Update Manifest set Notes = @Notes, IsCustom = @IsCustom, 
Column1 = 
    CASE WHEN @ProofSent = CONVERT(datetime, '01/01/1905') THEN NULL 
    ELSE @ProofSent END, 
Column2= 
    CASE WHEN @ProofApproved = CONVERT(datetime, '02/01/1905') THEN NULL 
    ELSE @ProofApproved END 

Answer 2

您還沒有宣佈什麼樣的列應當設置爲：

Update Manifest set Notes = @Notes, IsCustom = @IsCustom, 
    ProofSent = CASE WHEN @ProofSent = CONVERT(datetime, '01/01/1905') THEN NULL ELSE @ProofSent END, 
    ProofApproved = CASE WHEN @ProofApproved = CONVERT(datetime, '02/01/1905') THEN NULL ELSE @ProofApproved END