SQL在特定ID中選擇序號索引

Question

我正在使用SQL Server數據庫。說，我有一個選擇返回一個ID數組。我可以找出（與SQL）在該數組中的ID等於N的順序？

這是我的意思。這是我的實際選擇：

SELECT [id] FROM [dbo.test_db_002] t1 
LEFT JOIN [dbo.test_db_003] t2 
ON t1.[id]=t2.[itmid] 
ORDER BY t2.[iid] ASC; 

說，這將返回的ID下面的數組：

13, 7, 34, 5, 2, 14 

，並說我需要知道什麼索引是數組中的ID = 5（答案是3，如果圖13是索引0，7 =索引1，34 =索引2，5 =變爲索引3）

Answer 1

嘗試使用ROW_NUMBER（）：

SELECT ROW_NUMBER() OVER (ORDER BY t2.[iid] ASC) -1 AS RowIndex 
    ,[id] 
FROM [dbo.test_db_002] t1 
LEFT JOIN [dbo.test_db_003] t2 
    ON t1.[id]=t2.[itmid] 
ORDER BY t2.[iid] ASC; 

更多關於在這裏http://msdn.microsoft.com/en-us/library/ms186734.aspx

Answer 2

試試這個：

SELECT x.RowNum - 1 
FROM 
(
    SELECT [id], ROW_NUMBER() OVER (ORDER BY t2.[iid]) as RowNum 
    FROM [dbo.test_db_002] t1 
      LEFT JOIN [dbo.test_db_003] t2 ON t1.[id]=t2.[itmid] 
) x 
WHERE x.[id] = 5 

注意，-1是因爲ROW_NUMBER()從1開始，而不是0和你特別提到零索引數組。

Answer 3

嘗試......雖然我不知道你的表結構

Declare @Temp table 
(
    id int, 
    Name varchar(20) 
) 
Insert into @Temp 
    select 1, 'Bob' 
union all 
    select 2, 'Mark' 
union all 
    select 3, 'Shaun' 
union all 
    select 4, 'Ryan' 
union all 
    select 5, 'Steve' 
union all 
    select 6, 'Bryan' 
union all 
    select 7, 'Henry' 

Declare @Temp2 table 
(
    iid int, 
    itmid int, 
    Name varchar(20) 
) 
Insert into @Temp2 
    select 1, 3, 'Thing' 
union all 
    select 2, 2, 'This' 
union all 
    select 3, 5, 'That' 
union all 
    select 4, 1, 'They' 
union all 
    select 5, 3, 'There' 
union all 
    select 6, 5, 'Though' 
union all 
    select 7, 6, 'Thought' 

SELECT t1.[id], Row_Number() OVER (Order by t1.[id]) as RowNum 
FROM @Temp t1 
LEFT JOIN @Temp2 t2 ON t1.[id]=t2.[itmid] 
ORDER BY t1.[id] ASC;