Sql 在将为每个唯一主键分配唯一ID的视图中插入一列

我正在尝试在SQL Server 2012的视图中插入一个新列，以便为每个唯一的

TxnID

分配一个新编号

目前，TxnID的长度为28个字符。如果我能为每个

TxnID

分配一个以“1”开头的新数字，那就太好了

Current TxnID 
-------------------------
2010100009000010000006783
2010100009000010000006784
2010100009000010000006785
2010100009000010000006785

理想TxnID

1
2
3
3

---

使用排名函数

rank（）

，这会有所帮助

select *, rank() over (order by TxnID) TxnID from table 

使用行号（）

---

为此，我们可以使用多种方法-

--秩（）

--密秩

SELECT * , DENSE_RANK() OVER (ORDER BY [Current TxnID]) rowNumx FROM (
SELECT '2010100009000010000006783' [Current TxnID] UNION ALL
SELECT '2010100009000010000006784' UNION ALL
SELECT '2010100009000010000006785' UNION ALL
SELECT '2010100009000010000006785' )p

--其他

SELECT * , RANK() OVER (ORDER BY [Current TxnID]) rowNumx FROM (
SELECT '2010100009000010000006783' [Current TxnID] UNION ALL
SELECT '2010100009000010000006784' UNION ALL
SELECT '2010100009000010000006785' UNION ALL
SELECT '2010100009000010000006785' )p

SELECT * , DENSE_RANK() OVER (ORDER BY [Current TxnID]) rowNumx FROM (
SELECT '2010100009000010000006783' [Current TxnID] UNION ALL
SELECT '2010100009000010000006784' UNION ALL
SELECT '2010100009000010000006785' UNION ALL
SELECT '2010100009000010000006785' )p

;WITH CTE AS
(
    SELECT '2010100009000010000006783' [Current TxnID] UNION ALL
    SELECT '2010100009000010000006784' UNION ALL
    SELECT '2010100009000010000006785' UNION ALL
    SELECT '2010100009000010000006785' 
)
SELECT [Current TxnID], rowNumx = ( SELECT COUNT(*)+1 FROM CTE c1 WHERE c1.[Current TxnID] < c.[Current TxnID] )
FROM CTE c

/*------------------------
OUTPUT
------------------------*/
Current TxnID             rowNumx
------------------------- --------------------
2010100009000010000006783 1
2010100009000010000006784 2
2010100009000010000006785 3
2010100009000010000006785 3

(4 row(s) affected)