基於同一表列的一行的兩個值的SQL查詢

Question

我有兩列的一行報告，我想基於SQL表中的同一列。

例如，在報告中，應該是這樣的：

ID | Reason  | SubReason 
1 | Did not like | Appearance 

在SQL表是這樣的：

ID | ReturnReason 
1 | Did not like 
1 | XX*SR*Appearance 
1 | XX - TestData 
1 | XX - TestData2 

被新加入的SubReason柱和電流SQL查詢是這樣的：

SELECT ID, ReturnReason AS 'Reason' 
FROM table 
WHERE LEFT(ReturnReason,2) NOT IN ('XX') 

而現在我會喜歡e在SubReason的SELECT語句中添加一列，如果*SR*在該值中，則該值應爲該值。然而，這將不起作用，因爲它的值中還有'XX'，該值在當前的WHERE子句中被省略。

Answer 1

SELECT t.ID, t.ReturnReason AS 'Reason', 
SUBSTRING(t1.ReturnReason,7,10000) as 'SubReason ' 
FROM t 
LEFT JOIN t as t1 on t.id=t1.id and t1.ReturnReason LIKE 'XX*SR*%' 
WHERE t.ReturnReason NOT LIKE 'XX%' 

SQLFiddle demo