Appariement des enregistrements en fonction du nom de la personne

j'ai dû utiliser une variété de techniques suggérées. Merci de me pointer dans la bonne direction(s). J'espère que la suite va aider quelqu'un d'autre avec ce type de problème à résoudre.

suppression des caractères en excès

CREATE FUNCTION [dbo].[fn_StripCharacters]
(
    @String NVARCHAR(MAX), 
    @MatchExpression VARCHAR(255)
)
RETURNS NVARCHAR(MAX)
AS
BEGIN
    SET @MatchExpression =  '%['+@MatchExpression+']%'

    WHILE PatIndex(@MatchExpression, @String) > 0
        SET @String = Stuff(@String, PatIndex(@MatchExpression, @String), 1, '')

    RETURN @String

END

Utilisation:

--remove all non-alphanumeric and non-white space  
dbo.fn_StripCharacters(@Value, , '^a-z^0-9 ')  

Split nom dans les pièces

CREATE FUNCTION [dbo].[SplitTable] (@sep char(1), @sList StringList READONLY)
RETURNS @ResultList TABLE 
    (
        [ID] VARCHAR(MAX),
        [Val] VARCHAR(MAX)
    )
AS
BEGIN

declare @OuterCursor cursor
declare @ID varchar(max)
declare @Val varchar(max)

set @OuterCursor = cursor fast_forward for (SELECT * FROM @sList) FOR READ ONLY

open @OuterCursor

fetch next from @OuterCursor into @ID, @Val

while (@@FETCH_STATUS=0)
begin

    INSERT INTO @ResultList (ID, Val)   
    select @ID, split.s from dbo.Split(@sep, @Val) as split 
           where len(split.s) > 0

    fetch next from @OuterCursor into @ID, @Val
end

close @OuterCursor
deallocate @OuterCursor 

CREATE FUNCTION [dbo].[Split] (@sep char(1), @s varchar(8000))
RETURNS table
AS
RETURN (
    WITH Pieces(pn, start, stop) AS (
      SELECT 1, 1, CHARINDEX(@sep, @s)
      UNION ALL
      SELECT pn + 1, stop + 1, CHARINDEX(@sep, @s, stop + 1)
      FROM Pieces
      WHERE stop > 0
    )
    SELECT pn,
      LTRIM(RTRIM(SUBSTRING(@s, start, 
             CASE WHEN stop > 0 
                  THEN stop-start 
                  ELSE 8000 
             END))) AS s
    FROM Pieces
  )

RETURN

Utilisation:

--create split name list
DECLARE @NameList StringList 

INSERT INTO @NameList (ID, Val)
SELECT id, firstname FROM dbo.[User] u
WHERE PATINDEX('%[^a-z]%', u.FirstName) > 0 

----remove split dups
select u.ID, COUNT(*)
from dbo.import_SplitTable(' ', @NameList) splitList
INNER JOIN dbo.[User] u
ON splitList.id = u.id

Commune surnoms:

j'ai créé une table basée sur cette liste et l'a utilisé pour se joindre à nom commun équivalents.

Utilisation:

SELECT u.id
, u.FirstName
, u_nickname_maybe.Name AS MaybeNickname
, u.LastName
, c.ID AS ContactID from
FROM dbo.[User] u 
INNER JOIN nickname u_nickname_match
ON u.FirstName = u_nickname_match.Name
INNER JOIN nickname u_nickname_maybe
ON u_nickname_match.relatedid = u_nickname_maybe.id
LEFT OUTER JOIN
(
    SELECT c.id, c.LastName, c.FirstName, 
         c_nickname_maybe.Name AS MaybeFirstName
    FROM dbo.Contact c
    INNER JOIN nickname c_nickname_match
    ON c.FirstName = c_nickname_match.Name
    INNER JOIN nickname c_nickname_maybe
    ON c_nickname_match.relatedid = c_nickname_maybe.id
    WHERE c_nickname_match.Name <> c_nickname_maybe.Name
) as c
ON c.AccountHolderID = ah.ID 
       AND u_nickname_maybe.Name = c.MaybeFirstName AND u.LastName = c.LastName
WHERE u_nickname_match.Name <> u_nickname_maybe.Name

algorithmes phonétiques (Jaro Winkler):

L'incroyable article, Beyond SoundEx-Functions for Fuzzy search in MS SQL Server, montre comment installer et utiliser le SimMetrics bibliothèque dans le serveur SQL. Cette bibliothèque vous permet de trouver une similitude relative entre les cordes et comprend de nombreux algorithmes. J'ai fini le plus souvent en utilisant Jaro Winkler pour faire correspondre les noms.

Utilisation:

SELECT
u.id AS UserID
,c.id AS ContactID
,u.FirstName
,c.FirstName 
,u.LastName
,c.LastName
,maxResult.CombinedScores
 from
(
    SELECT
      u.ID
    , 
        max(
            dbo.JaroWinkler(lower(u.FirstName), lower(c.FirstName))  
            * dbo.JaroWinkler(LOWER(u.LastName), LOWER(c.LastName))
        ) AS CombinedScores
    FROM dbo.[User] u, dbo.[Contact] c
    WHERE u.ContactID IS NULL
    GROUP BY u.id
) AS maxResult
INNER JOIN dbo.[User] u
ON maxResult.id  = u.id
INNER JOIN dbo.[Contact] c
ON maxResult.CombinedScores = 
dbo.JaroWinkler(lower(u.FirstName), lower(c.FirstName)) 
* dbo.JaroWinkler(LOWER(u.LastName), LOWER(c.LastName))