我是 SQL Server 性能优化领域的新手。但是我有一个需要将近 2 个小时才能执行的存储过程的问题 - 我认为这是一个很长的时间。它必须遍历大约 100000 条记录，并且我使用了计算列（计算列有一个前缀Upper_）。
据我的老板说，我们不能使用全文搜索——所以我真的希望在不使用全文搜索的情况下有性能的可能性。
我花了很多时间在互联网上搜索，但没有任何进一步的成功。
也许我可以以正确的方式使用索引——但我也不知道如何正确地使用它们。
我的存储过程如下所示：
ALTER PROCEDURE [dbo].[DuplicateLevel4]
@UserID INT
AS
SET NOCOUNT ON
DECLARE @dubletNo INT,
@subDubletNo INT,
@Vennenr INT,
@fornavn VARCHAR(max),
@shortenfornavn VARCHAR(MAX),
@efternavn VARCHAR(max),
@adresse VARCHAR(max),
@postnr VARCHAR(max),
@telefon VARCHAR(max),
@tlf1 VARCHAR(MAX),
@email VARCHAR(MAX),
@done BIT,
@oldTime DATETIME
SET @dubletNo = 1
SET @oldtime = current_Timestamp
IF (SELECT COUNT(ID) FROM DuplicateSetup) > 0
UPDATE DuplicateSetup
SET IsOrdered = 1, OrderDateTime = @oldTime, CurrentLevel = 4
ELSE
INSERT INTO DuplicateSetup (IsOrdered, OrderDateTime, CurrentLevel)
VALUES (1, @oldTime, 4)
DELETE FROM DuplicateList;
CREATE TABLE #tempTable
(
[DubletNo] [int] NULL,
[SubDubletNo] [int] NULL,
[UseOrganisation] [bit] NULL,
[UseFornavn] [bit] NULL,
[UseEfternavn] [bit] NULL,
[UseAdresse] [bit] NULL,
[UsePostCode] [bit] NULL,
[UseTlf1] [bit] NULL,
[UseTlf2] [bit] NULL,
[UseEmail] [bit] NULL,
[Choice] [smallint] NULL,
[AKeep] [bit] NULL,
[FriendID] [int] NULL,
[UseBornDate] [bit] NULL
)
CREATE CLUSTERED INDEX idxTempTableFriendID ON #tempTable (FriendID)
CREATE NONCLUSTERED INDEX idxTempTableDubletNo ON #tempTable (DubletNo)
DECLARE Friend_Cursor CURSOR FOR
SELECT
vennenr,
CASE
WHEN CHARINDEX(' ', ISNULL(Fornavn, '')) > 0
THEN UPPER(RTRIM(SUBSTRING(ISNULL(Fornavn, ''), 1, CHARINDEX(' ', ISNULL(Fornavn, '')))))
WHEN CHARINDEX(' ', ISNULL(Fornavn, '')) = 0
THEN UPPER(RTRIM(SUBSTRING(ISNULL(Fornavn, ''), 1, LEN(ISNULL(Fornavn, '')))))
END AS ShortenFornavn,
UPPER(Fornavn),
UPPER(Efternavn),
UPPER(adresse),
UPPER((Postnr)),
REPLACE(Telefon, ' ', ''),
REPLACE(Tlf1, ' ', ''),
UPPER([E-mail])
FROM
Medlemsdata
LEFT OUTER JOIN
Postnumre
RIGHT OUTER JOIN
MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr
ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE
vennenr > 0
AND vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends
WHERE ALevelNo = 4)
AND ((Fornavn IS NOT NULL
AND dbo.getToSpace(Fornavn) NOT IN ('')
AND Efternavn IS NOT NULL
AND Efternavn NOT IN ('')
AND Adresse IS NOT NULL
AND Adresse NOT IN ('')
AND Telefon IS NOT NULL
AND Telefon NOT IN ('')
AND Postnr IS NOT NULL
AND Postnr NOT IN ('')) OR
(Fornavn IS NOT NULL AND Fornavn NOT IN ('')
AND Efternavn IS NOT NULL AND Efternavn NOT IN ('')
AND Adresse IS NOT NULL AND Adresse NOT IN ('')
AND Postnr IS NOT NULL AND Postnr NOT IN ('')) OR
(Fornavn IS NOT NULL AND dbo.getToSpace(Fornavn) NOT IN ('')
AND Efternavn IS NOT NULL AND Efternavn NOT IN ('')
AND Adresse IS NOT NULL AND Adresse NOT IN ('')
AND Tlf1 IS NOT NULL AND Tlf1 NOT IN ('')
AND Postnr IS NOT NULL AND Postnr NOT IN ('')) OR
(Fornavn IS NOT NULL AND dbo.getToSpace(Fornavn) NOT IN ('')
AND Efternavn IS NOT NULL AND Efternavn NOT IN ('')
AND Adresse IS NOT NULL AND Adresse NOT IN ('')
AND [E-mail] IS NOT NULL AND [E-mail] NOT IN ('')
AND Postnr IS NOT NULL AND Postnr NOT IN ('')) OR
(Fornavn IS NOT NULL AND dbo.getToSpace(Fornavn) NOT IN ('')
AND Efternavn IS NOT NULL AND Efternavn NOT IN ('')
AND Telefon IS NOT NULL AND Telefon NOT IN ('')
AND [E-mail] IS NOT NULL AND [E-mail] NOT IN ('')))
ORDER BY
Vennenr
OPEN Friend_Cursor
FETCH NEXT FROM Friend_Cursor INTO @Vennenr, @shortenfornavn, @fornavn, @efternavn, @adresse, @postnr, @telefon, @tlf1, @email
--loop på alle venner > 0
WHILE @@FETCH_STATUS = 0
BEGIN
-- Check om venner er håndteret før
IF (SELECT COUNT(FriendID) FROM #tempTable WHERE FriendID = @Vennenr) = 0
BEGIN
-- initializing
SET @done = 0;
-- Indsæt første dublet
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
VALUES (@Vennenr, @dubletNo, 1, 1,1,1,1,1,1,1,1,0,0,1)
SET @subDubletNo = 1;
-- Første check
IF @done = 0
BEGIN
IF EXISTS (SELECT Vennenr
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr
ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(ISNULL(telefon,'') LIKE '%' + @telefon + '%') AND (LEN(@telefon) > 7) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
)
BEGIN
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT Vennenr, @dubletNo, ROW_NUMBER() OVER (ORDER BY Vennenr) + @subDubletNo, 0,0,0,0,0,0,0,0,0,0,0
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(ISNULL(telefon,'') LIKE '%' + @telefon + '%') AND (LEN(@telefon) > 7) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
SET @subDubletNo = (SELECT COUNT(FriendID) FROM #tempTable WHERE DubletNo = @dubletNo)
SET @done = 1
END
END
-- Andet check
IF @done = 0 BEGIN
IF EXISTS (
SELECT Vennenr
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn IN (@fornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
)
BEGIN
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT Vennenr, @dubletNo, ROW_NUMBER() OVER (ORDER BY Vennenr) + @subDubletNo, 0,0,0,0,0,0,0,0,0,0,0
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn IN (@fornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
SET @subDubletNo = (SELECT COUNT(FriendID) FROM #tempTable WHERE DubletNo = @dubletNo)
SET @done = 1
END
END
-- Tredje check
IF @done = 0 BEGIN
IF EXISTS (
SELECT Vennenr
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(ISNULL(Tlf1,'') LIKE '%' + @tlf1 + '%') AND (LEN(@tlf1) > 7) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
)
BEGIN
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT Vennenr, @dubletNo, ROW_NUMBER() OVER (ORDER BY Vennenr) + @subDubletNo, 0,0,0,0,0,0,0,0,0,0,0
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@Adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(ISNULL(Tlf1,'') LIKE '%' + @tlf1 + '%') AND (LEN(@tlf1) > 7) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
SET @subDubletNo = (SELECT COUNT(FriendID) FROM #tempTable WHERE DubletNo = @dubletNo)
SET @done = 1
END
END
-- Fjerde check
IF @done = 0 BEGIN
IF EXISTS (
SELECT Vennenr
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(Upper_Email IN (@email)) AND (Upper_Email NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
)
BEGIN
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT Vennenr, @dubletNo, ROW_NUMBER() OVER (ORDER BY Vennenr) + @subDubletNo, 0,0,0,0,0,0,0,0,0,0,0
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(Upper_Adresse IN (@adresse)) AND (Upper_Adresse NOT IN ('')) AND
(Upper_Postnr IN (@postnr)) AND (Upper_postnr NOT IN ('')) AND
(Upper_Email IN (@email)) AND (Upper_Email NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
SET @subDubletNo = (SELECT COUNT(FriendID) FROM #tempTable WHERE DubletNo = @dubletNo)
SET @done = 1
END
END
-- Femte check
IF @done = 0 BEGIN
IF EXISTS (
SELECT Vennenr
FROM Medlemsdata
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(ISNULL(Telefon,'') LIKE '%' + @telefon + '%') AND (LEN(@telefon) > 7) AND
(Upper_Email IN (@email)) AND (Upper_Email NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
)
BEGIN
INSERT INTO #tempTable (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT Vennenr, @dubletNo, ROW_NUMBER() OVER (ORDER BY Vennenr) + @subDubletNo, 0,0,0,0,0,0,0,0,0,0,0
FROM Medlemsdata
WHERE (Vennenr <> @Vennenr) AND (Upper_Fornavn_FirstPart IN (@shortenfornavn)) AND (Upper_Fornavn NOT IN ('')) AND
(Upper_Efternavn IN (@efternavn)) AND (Upper_Efternavn NOT IN ('')) AND
(ISNULL(Telefon,'') LIKE '%' + @telefon + '%') AND (LEN(@telefon) > 7) AND
(Upper_Email IN (@email)) AND (Upper_Email NOT IN ('')) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4) AND
vennenr NOT IN (SELECT FriendID FROM #tempTable)
SET @subDubletNo = (SELECT COUNT(FriendID) FROM #tempTable WHERE DubletNo = @dubletNo)
SET @done = 1
END
END
-- Hvis der ikke var noget match, så ...
IF @subDubletNo = 1 BEGIN
DELETE FROM #tempTable WHERE FriendID = @Vennenr
END
ELSE BEGIN
SET @dubletNo = @dubletNo + 1
END
END
FETCH NEXT FROM Friend_Cursor INTO @Vennenr, @shortenfornavn, @fornavn, @efternavn, @adresse, @postnr, @telefon, @tlf1, @email
END
INSERT INTO DuplicateList (FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate])
SELECT FriendID, DubletNo, SubDubletNo, [UseOrganisation], [UseFornavn], [UseEfternavn], [UseAdresse], [UsePostCode], [UseTlf1], [UseTlf2], [UseEmail], [Choice], [AKeep], [UseBornDate]
FROM #tempTable
CLOSE Friend_Cursor
DEALLOCATE Friend_Cursor
UPDATE DuplicateSetup SET IsOrdered = 0, OrderDateTime = null, UserID = @UserID, Updated = CURRENT_TIMESTAMP
INSERT INTO DuplicateTimeConsumption (ALevel, TimeConsumption) VALUES (4, current_Timestamp - @oldtime)
SET NOCOUNT OFF
我的计算列之一如下所示：
ALTER TABLE Medlemsdata ADD Upper_Fornavn_FirstPart AS
CASE
WHEN CHARINDEX(' ', Fornavn) = 0 THEN UPPER(Fornavn)
WHEN CHARINDEX(' ', Fornavn) > 0 THEN UPPER(RTRIM(LEFT(Fornavn,CHARINDEX(' ', Fornavn))))
END
PERSISTED
我真的希望有/是性能优化的基础，并且有人可以给我一个关于要照顾什么的想法。
此处测试代码：
SELECT Vennenr
FROM Medlemsdata
LEFT OUTER JOIN Postnumre
RIGHT OUTER JOIN MedlemsAdresse ON Postnumre.Postnummer = MedlemsAdresse.Postnr ON Medlemsdata.FK_AdrID = MedlemsAdresse.AdrID
WHERE (Vennenr <> 1) AND Upper_Fornavn_FirstPart = CASE WHEN Upper_Fornavn_FirstPart IS NOT NULL THEN 'MICHAEL' ELSE '' END AND
Upper_Efternavn = CASE WHEN Upper_Efternavn IS NOT NULL THEN 'ERIKSEN' ELSE '' END AND
Upper_Adresse = CASE WHEN Upper_Adresse IS NOT NULL THEN 'HELIOSVEJ 23' ELSE '' END AND
Upper_Postnr = CASE WHEN Upper_Postnr IS NOT NULL THEN '7100' ELSE '' END AND (ISNULL(telefon,'') LIKE '%' + '23747585' + '%') AND (LEN('23747585') > 7) AND
vennenr > 0 AND
vennenr NOT IN (SELECT FriendID FROM DuplicateForgetFriends WHERE ALevelNo = 4)
提前致谢，
迈克尔