在SQL列中添加特定值列由其他列確定

Question

我有一個數據庫根據標籤確定不同的值。 標籤決定它是否爲豁免值的地方。例如，2 =未被豁免，3 =被豁免。如果我運行一個查詢我的結果是這個樣子

|Name |ExemptionStatus |Total Value| 
    |X  |2    |100  | 
    |X  |3    |200  | 

我的查詢是

SELECT NAME, EXEMPTIONSTATUS 
      SUM(TOTAL_VALUE) AS 'TOTAL VALUE' 
    FROM ORDER_ACCOUNT JOIN ACCOUNT_INVOICE 
    WHERE ORDER_ACCOUNT.DATE BETWEEN 'M/D/YEAR' AND 'M/D/YEAR' 
    GROUP BY NAME, EXEMPTIONSTATUS 
    ORDER BY NAME ASC 

我怎樣才能得到我的查詢以創建值的新列，例如：

|Name |NON EXEMPT VALUE|EXEMPT VALUE| 
    |X  |100    |200   | 

我只是不知道如何排序它是否在我的Where子句中。

Answer 1

在一個SUM中使用CASE語句，只有總數爲NON EXEMPT，然後是EXEMPT，然後選擇它們作爲單獨的列。類似以下內容（可能需要TOTAL_VALUE添加到GROUP BY或刪除EXEMPTIONSTATUS）

SELECT 
NAME 
,SUM(CASE WHEN EXEMPTIONSTATUS = 2 THEN TOTAL_VALUE ELSE 0 END) AS 'NON EXEMPT VALUE' 
,SUM(CASE WHEN EXEMPTIONSTATUS = 3 THEN TOTAL_VALUE ELSE 0 END) AS 'EXEMPT VALUE' 
FROM ORDER_ACCOUNT JOIN ACCOUNT_INVOICE 
WHERE ORDER_ACCOUNT.DATE BETWEEN 'M/D/YEAR' AND 'M/D/YEAR' 
GROUP BY NAME, EXEMPTIONSTATUS 
ORDER BY NAME ASC 

編輯：下面新代碼添加新的列到現有的表。你需要用你的牌桌代替#Test，但我相信這會讓你找到你想要的。

SELECT 
NAME, 
EXEMPTIONSTATUS 
,[TOTAL_VALUE] 
,(SELECT SUM(CASE WHEN EXEMPTIONSTATUS = 2 THEN TOTAL_VALUE ELSE 0 END) FROM #Test t WHERE t.NAME = NAME) 'NON EXEMPT VALUE' 
,(SELECT SUM(CASE WHEN EXEMPTIONSTATUS = 3 THEN TOTAL_VALUE ELSE 0 END) FROM #Test t WHERE t.NAME = NAME) 'EXEMPT VALUE' 
FROM #Test 

這給了我下面的輸出

| NAME | EXEMPTIONSTATUS | TOTAL_VALUE | NON EXEMPT VALUE | EXEMPT VALUE | 
| X | 2    | 100   | 100    | 200   | 
| X | 3    | 200   | 100    | 200   | 

Answer 2

比方說，你的表結構是這樣的：

CREATE TABLE tab(ID int, Name nvarchar(20), ExemptionStatus int, TotalValue int); 
INSERT INTO tab(ID, Name, ExemptionStatus, TotalValue) values (1, 'X', 2, 100); 
INSERT INTO tab(ID, Name, ExemptionStatus, TotalValue) values (2, 'X', 3, 200); 

所以你的數據看起來是這樣的：

ID Name ExemptionStatus TotalValue 
    1  X  2    100 
    2  X  3    200 

然後你使用的查詢是：

SELECT  NotExempted.Name, 
      NotExempted.NonExemptValue, 
      Exempted.ExemptValue 
FROM  (SELECT  Name, 
         CASE 
          WHEN ExemptionStatus = 2 THEN TotalValue 
         END 
         AS 'NonExemptValue' 
      FROM  #tab 
      ) NotExempted 
INNER JOIN (SELECT  Name, 
         CASE 
          WHEN ExemptionStatus = 3 THEN TotalValue 
         END 
         AS 'ExemptValue' 
      FROM  #tab 
      ) Exempted ON NotExempted.Name = Exempted.Name 
WHERE  NotExempted.NonExemptValue IS NOT NULL 
AND   Exempted.ExemptValue IS NOT NULL 
GROUP BY  NotExempted.Name, 
      NotExempted.NonExemptValue, 
      Exempted.ExemptValue 

你結果將是這樣的：

Name NonExemptValue ExemptValue 
X   100    200 

這裏你可以看到這一點 - >http://sqlfiddle.com/#!9/8902d3/2

現在，讓我們假設你有數據是這樣的：

CREATE TABLE #tab(ID int, Name nvarchar(20), ExemptionStatus int, TotalValue int) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (1, 'X', 2, 100) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (2, 'X', 3, 200) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (3, 'X', 2, 1000) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (4, 'X', 3, 2000) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (5, 'X', 2, 1045) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (6, 'X', 3, 2045) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (7, 'X', 2, 1034) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (8, 'X', 3, 2023) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (9, 'X', 2, 1023) 
INSERT INTO #tab(ID, Name, ExemptionStatus, TotalValue) values (10, 'X', 3, 2076) 

看起來像這樣：

ID Name ExemptionStatus TotalValue 
    1  X   2    100 
    2  X   3    200 
    3  X   2    1000 
    4  X   3    2000 
    5  X   2    1045 
    6  X   3    2045 
    7  X   2    1034 
    8  X   3    2023 
    9  X   2    1023 
    10  X   3    2076 

如果您需要總結的總價值高達，那麼你可以使用下面的查詢（這是上面的查詢略有修改）：

SELECT  NotExempted.Name, 
      NotExempted.NonExemptValue, 
      Exempted.ExemptValue 
FROM  (SELECT  Name, 
         CASE 
          WHEN ExemptionStatus = 2 THEN (SELECT SUM(TotalValue) FROM #tab WHERE ExemptionStatus = 2) 
         END 
         AS 'NonExemptValue' 
      FROM  #tab 
      ) NotExempted 
INNER JOIN (SELECT  Name, 
         CASE 
          WHEN ExemptionStatus = 3 THEN (SELECT SUM(TotalValue) FROM #tab WHERE ExemptionStatus = 3) 
         END 
         AS 'ExemptValue' 
      FROM  #tab 
      ) Exempted ON NotExempted.Name = Exempted.Name 
WHERE  NotExempted.NonExemptValue IS NOT NULL 
AND   Exempted.ExemptValue IS NOT NULL 
GROUP BY  NotExempted.Name, 
      NotExempted.NonExemptValue, 
      Exempted.ExemptValue 

你的結果會是這樣的：

Name NonExemptValue ExemptValue 
X   4202    8344 

這裏你可以看到這一點 - >http://sqlfiddle.com/#!9/02c76/3

希望這有助於！