我有以下查詢，每當我運行它，它給了我附近的語法不正確「作爲」

Question

SELECT 
CAST((Discount_Amount AS numeric(11,2))/1.14)*0.14 AS [Service Tax] 
FROM APDEPADV 

Answer 1

試試這個

SELECT 
    (CAST(Discount_Amount AS numeric(11,2))/1.14)*0.14 AS [Service Tax] 
    FROM APDEPADV 

Answer 2

我覺得你的括號是在錯誤的地方：

SELECT 
(CAST(Discount_Amount AS numeric(11,2))/1.14)*0.14 AS [Service Tax] 
FROM APDEPADV 

您應該先鑄造Discount_Amount首先，然後執行其他計算：

1. 演員DISCOUNT_AMOUNT爲數值
2. 接下來，1.14
3. 最後劃分的結果，乘這一切0.14

如果你打破你的代碼下來了一點，你可以理解這是怎麼回事：

1. CAST的語法如下：CAST(a AS b)
2. 你的代碼有：CAST((Discount_Amount AS numeric(11,2))/1.14)
3. 因爲你必須分割內部的CAST功能，那麼整個表達(Discount_Amount AS numeric(11,2))/1.14被視爲要（在點1 a以上）鑄值。

這有一些後果。首先，CAST(a AS b)現已成爲CAST(a)，這並沒有太大的意義（你在它鑄造？）

其次，這意味着表達Discount_Amount AS numeric(11,2)被單獨處理的CAST功能。類似Discount_Amount/1.14是一個有效的表達式，但其本身並不是(Discount_Amount AS numeric(11,2))/1.14，這就是您接收錯誤的原因。

通過重新排列括號，你應該得到更接近你想要什麼：

SELECT 
(
    CAST(Discount_Amount AS numeric(11,2)) 
    /1.14 
) 
* 0.14 
AS [Service Tax] 
FROM APDEPADV 

Answer 3

括號的順序是錯誤的。理解表達式，然後相應地重寫括號。

SELECT 
((Cast(Discount_Amount AS numeric(11,2))/1.14)*0.14 AS [Service Tax] 
FROM APDEPADV