Question

我们说我有以下名称： John Smith Alexander 。我想得到John Alexander Smith; Smith John Alexander; Alexander Smith John; etc.

中间名不一定存在，因此 John Smith 我应该只收到John Smith和Smith John。

全名可能包含4个字或更多，但很少。

Answer 1

首先分解字符串：

DECLARE @separator char(1)
DECLARE @NameParts TABLE (PartId INT IDENTITY, part varchar(50))
DECLARE @Name varchar(50)
SET @separator = ' '
SET @name = 'John Smith Alexander'
;WITH Parts(pn, start, finish) AS (
  SELECT 1, 1, CHARINDEX(@separator, @Name)
  UNION ALL
  SELECT pn + 1, finish + 1, CHARINDEX(@separator, @Name, finish + 1)
  FROM Parts
  WHERE finish > 0
)
INSERT INTO @NameParts(part)
SELECT SUBSTRING(@Name, start, CASE WHEN finish > 0 THEN finish-start ELSE 50 END)
FROM Parts

然后得到排列：

DECLARE @tokencount int
SELECT @tokencount = COUNT(*) FROM @NameParts

;WITH Subsets AS 
(
SELECT CAST(' ' + part AS VARCHAR(MAX)) Permutation,
CAST(1 AS INT) AS Iteration
FROM @NameParts 
UNION ALL
SELECT Permutation + ' ' + part  AS Permutation, Iteration + 1 AS Iteration
FROM Subsets s 
JOIN @NameParts n ON s.Permutation NOT LIKE '%' + n.part + '%'
)
SELECT STUFF(Permutation,1,1,'') As Perm 
FROM SUBSETS
WHERE Iteration = @tokencount

Answer 2

SELECT a.name, b.name, c.name 
FROM test a, test b, test c 
WHERE a.name != b.name 
  AND a.name != c.name 
  AND b.name != c.name;

适用于我的数据库，而不是tsql。当然，如果不修改2个或4个名称，它将无法工作，并且超过4个名称将无法维护。

对于像John Richard John这样的名称，它也不会起作用。

从FirstName，LastName和Middle Name生成单词排列

2 个答案: