Retrieve data between 2 '.'

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Retrieve data between 2 '.'

davdam8

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Points: 3620
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October 24, 2012 at 2:56 am

#283374

Hi geniuses!
Hi have a field (VALUE), which contains data like:
MNN.helloworld
GFF.goodbyeworld
SSW.seeyoulaterworld.oops
And I want to retrieve data when there's only one '.' in the data.
Is this doable?
Thanks
Regards

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Cadavre SSC-Forever Points: 41690 More actions · Answer 1

--========================--

--== CREATE SAMPLE DATA ==--

--========================--

SELECT yourData

INTO #yourTable

FROM (VALUES('MNN.helloworld'),('GFF.goodbyeworld'),('SSW.seeyoulaterworld.oops')

)a(yourData);

--========================--

--== SOLUTION ==--

--========================--

SELECT *

FROM #yourTable

WHERE LEN(yourData)-1 = LEN(REPLACE(yourData COLLATE Latin1_General_BIN2,'.',''));

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davdam8 Hall of Fame Points: 3620 More actions · Answer 2

Thanks

It gives me an error: Argument data type ntext is invalid for argument 1 of len function

Solutions?

Regards

Cadavre SSC-Forever Points: 41690 More actions · Answer 3

davdam8 (10/24/2012)
Thanks
It gives me an error: Argument data type ntext is invalid for argument 1 of len function
Solutions?
Regards

That would be because you didn't supply DDL or readily consumable sample data, which caused me to assume that you were not using a deprecated type.

You'll have to cast it to NVARCHAR or VARCHAR to use, e.g.

SELECT *

FROM #yourTable

WHERE LEN(CAST(yourData AS NVARCHAR(MAX)))-1 = LEN(REPLACE(CAST(yourData AS NVARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.',''));

Forever trying to learn
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davdam8 Hall of Fame Points: 3620 More actions · Answer 4

davdam8

Hall of Fame

Points: 3620

October 24, 2012 at 3:26 am

#1552181

WOW!

Works great!

Thanks body!

Regards

Sean Lange SSC Guru Points: 286590 More actions · Answer 5

davdam8 (10/24/2012)
WOW!
Works great!
Thanks body!
Regards

And if at all possible change your ntext to nvarchar(max). ntext is deprecated and complete PITA to work with.

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BriPan SSCrazy Points: 2061 More actions · Answer 6

second option for the same requiment

declare @temp table(t varchar(50))

insert into @temp

select * from

(

values

('a.p'),

('y.a.p'),

('k.p')

)a (name)

select *

from @temp

where CHARINDEX('.',t,CHARINDEX('.',t)+1)=0

Cadavre SSC-Forever Points: 41690 More actions · Answer 7

Two solutions. . . this means performance check!! 🙂

Here's 1 million rows of sample data: -

SET NOCOUNT ON;

IF object_id('tempdb..#testEnvironment') IS NOT NULL

BEGIN

DROP TABLE #testEnvironment;

END;

--1,000,000 Random rows of data

SELECT IDENTITY(INT,1,1) AS ID, CAST(LEFT(yourData, LEN(yourData) - 1) AS NTEXT) AS yourData

INTO #testEnvironment

FROM (SELECT TOP 1000000

REPLICATE(

REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(

REPLACE(NEWID(),'-','')

,'0',''),'9',''),'8',''),'7',''),'6',''),'5',''),'4',''),'3',''),'2',''),'1','') + '.',

(ABS(CHECKSUM(NEWID())) % 2) + 2)

FROM master.dbo.syscolumns sc1, master.dbo.syscolumns sc2, master.dbo.syscolumns sc3

)a(yourData);

DECLARE @HOLDER INT, @Duration CHAR(12), @StartTime DATETIME;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData, CHARINDEX('.', yourData) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX = %s',0,1,@Duration) WITH NOWAIT;

SELECT @StartTime = SYSDATETIME();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE LEN(CAST(yourData AS NVARCHAR(MAX)))-1 = LEN(REPLACE(CAST(yourData AS NVARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.',''));

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LEN = %s',0,1,@Duration) WITH NOWAIT;

Duration for CHARINDEX = 00:00:10:660

Duration for LEN = 00:00:06:327

Second run (I recreated the test environment between each run):-

DECLARE @HOLDER INT, @Duration CHAR(12), @StartTime DATETIME;

SELECT @StartTime = SYSDATETIME();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE LEN(CAST(yourData AS NVARCHAR(MAX)))-1 = LEN(REPLACE(CAST(yourData AS NVARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.',''));

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LEN = %s',0,1,@Duration) WITH NOWAIT;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData, CHARINDEX('.', yourData) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX = %s',0,1,@Duration) WITH NOWAIT;

Duration for LEN = 00:00:10:927

Duration for CHARINDEX = 00:00:05:900

So the CHARINDEX function looks better, but both are pretty slow.

Anyone got a better way?

Forever trying to learn
My blog - http://www.cadavre.co.uk/
For better, quicker answers on T-SQL questions, click on the following...http://www.sqlservercentral.com/articles/Best+Practices/61537/
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Mark Cowne One Orange Chip Points: 26954 More actions · Answer 8

A mix of the two seems to help

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData COLLATE Latin1_General_BIN2 , CHARINDEX('.', yourData COLLATE Latin1_General_BIN2) + 1) = 0;

____________________________________________________

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Cadavre SSC-Forever Points: 41690 More actions · Answer 9

Good idea Mark. I also added an ugly XML split to count the number of "items", then modified the test script to clear the cache between each piece of code to attempt to keep it fairer.

SET NOCOUNT ON;

IF object_id('tempdb..#testEnvironment') IS NOT NULL

BEGIN

DROP TABLE #testEnvironment;

END;

--1,000,000 Random rows of data

SELECT IDENTITY(INT,1,1) AS ID, CAST(LEFT(yourData, LEN(yourData) - 1) AS NTEXT) AS yourData

INTO #testEnvironment

FROM (SELECT TOP 1000000

REPLICATE(

REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(

REPLACE(NEWID(),'-','')

,'0',''),'9',''),'8',''),'7',''),'6',''),'5',''),'4',''),'3',''),'2',''),'1','') + '.',

(ABS(CHECKSUM(NEWID())) % 2) + 2)

FROM master.dbo.syscolumns sc1, master.dbo.syscolumns sc2, master.dbo.syscolumns sc3

)a(yourData);

DECLARE @HOLDER INT, @Duration CHAR(12), @StartTime DATETIME;

DBCC FREEPROCCACHE;

DBCC DROPCLEANBUFFERS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM (SELECT ID, yourData, MAX(rn)

FROM (SELECT ID, yourData, split.Part.value('text()[1]', 'VARCHAR(MAX)'), ROW_NUMBER() OVER(PARTITION BY yourData ORDER BY (SELECT NULL))

FROM (SELECT CAST('' + REPLACE(CAST(yourData AS VARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.','') + '' AS XML),

CAST(yourData AS VARCHAR(MAX)), ID

FROM #testEnvironment) innerQ(xmlField, yourData, ID)

CROSS APPLY innerQ.xmlField.nodes('p') split(Part)

) a(ID, yourData,splitData,rn)

GROUP BY ID, yourData

) a(ID, yourData, rn)

WHERE rn = 2;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for ugly xml split = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE;

DBCC DROPCLEANBUFFERS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData, CHARINDEX('.', yourData) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE;

DBCC DROPCLEANBUFFERS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE LEN(CAST(yourData AS NVARCHAR(MAX)))-1 = LEN(REPLACE(CAST(yourData AS NVARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.',''));

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LEN = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE;

DBCC DROPCLEANBUFFERS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData COLLATE Latin1_General_BIN2 , CHARINDEX('.', yourData COLLATE Latin1_General_BIN2) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX with COLLATE = %s',0,1,@Duration) WITH NOWAIT;

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Duration for ugly xml split = 00:00:48:980

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Duration for CHARINDEX = 00:00:08:640

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Duration for LEN = 00:00:09:087

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Duration for CHARINDEX with COLLATE = 00:00:05:323

So the CHARINDEX with COLLATE that Mark suggested is the fastest so far - whilst my ugly XML splitter proves its worth as considerably slower 😀

Forever trying to learn
My blog - http://www.cadavre.co.uk/
For better, quicker answers on T-SQL questions, click on the following...http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better, quicker answers on SQL Server performance related questions, click on the following...http://www.sqlservercentral.com/articles/SQLServerCentral/66909/

Davin21 SSC Eights! Points: 860 More actions · Answer 10

How about this?

SELECT *

FROM #testenvironment

WHERE PARSENAME(CAST(yourdata AS NVARCHAR(MAX)),3) IS NULL

Luis Cazares SSC Guru Points: 183706 More actions · Answer 11

I was so close, thanks to the QotD that made me remember the PARSENAME function.

My code

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE PARSENAME( CAST(yourData AS NVARCHAR(MAX)),3) IS NULL

AND PARSENAME(CAST(yourData AS NVARCHAR(MAX)), 2) IS NOT NULL

Results using Cadavre's last test environment (without the XML). I deleted the "DBCC execution completed" comments.

Duration for CHARINDEX = 00:00:18:363

Duration for LEN = 00:00:09:347

Duration for PARSENAME = 00:00:06:870

Duration for COLLATE = 00:00:06:667

Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?

How to post data/code on a forum to get the best help: Option 1 / Option 2

Luis Cazares SSC Guru Points: 183706 More actions · Answer 12

Davin21 (10/25/2012)
How about this?
SELECT *
FROM #testenvironment
WHERE PARSENAME(CAST(yourdata AS NVARCHAR(MAX)),3) IS NULL

I had the same idea, but I added an extra condition because your query will return results with no period (or dot) and with more than 3.

Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?

How to post data/code on a forum to get the best help: Option 1 / Option 2

Cadavre SSC-Forever Points: 41690 More actions · Answer 13

Luis Cazares (10/25/2012)
I was so close, thanks to the QotD that made me remember the PARSENAME function.
My code
SELECT @HOLDER = ID
FROM #testEnvironment
WHERE PARSENAME( CAST(yourData AS NVARCHAR(MAX)),3) IS NULL
AND PARSENAME(CAST(yourData AS NVARCHAR(MAX)), 2) IS NOT NULL
Results using Cadavre's last test environment (without the XML). I deleted the "DBCC execution completed" comments.
Duration for CHARINDEX = 00:00:18:363
Duration for LEN = 00:00:09:347
Duration for PARSENAME = 00:00:06:870
Duration for COLLATE = 00:00:06:667

Very good, that was sort of the idea I was trying to implement with the XML splitter. Didn't think of PARSENAME (foolishly!).

Also, we can get rid of the "DBCC execution completed" comments by adding "WITH NO_INFOMSGS" to the script, like so: -

SET NOCOUNT ON;

IF object_id('tempdb..#testEnvironment') IS NOT NULL

BEGIN

DROP TABLE #testEnvironment;

END;

--1,000,000 Random rows of data

SELECT IDENTITY(INT,1,1) AS ID, CAST(LEFT(yourData, LEN(yourData) - 1) AS NTEXT) AS yourData

INTO #testEnvironment

FROM (SELECT TOP 1000000

REPLICATE(

REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(

REPLACE(NEWID(),'-','')

,'0',''),'9',''),'8',''),'7',''),'6',''),'5',''),'4',''),'3',''),'2',''),'1','') + '.',

(ABS(CHECKSUM(NEWID())) % 2) + 2)

FROM master.dbo.syscolumns sc1, master.dbo.syscolumns sc2, master.dbo.syscolumns sc3

)a(yourData);

DECLARE @HOLDER INT, @Duration CHAR(12), @StartTime DATETIME;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM (SELECT ID, yourData, MAX(rn)

FROM (SELECT ID, yourData, split.Part.value('text()[1]', 'VARCHAR(MAX)'), ROW_NUMBER() OVER(PARTITION BY yourData ORDER BY (SELECT NULL))

FROM (SELECT CAST('' + REPLACE(CAST(yourData AS VARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.','') + '' AS XML),

CAST(yourData AS VARCHAR(MAX)), ID

FROM #testEnvironment) innerQ(xmlField, yourData, ID)

CROSS APPLY innerQ.xmlField.nodes('p') split(Part)

) a(ID, yourData,splitData,rn)

GROUP BY ID, yourData

) a(ID, yourData, rn)

WHERE rn = 2;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for ugly xml split = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData, CHARINDEX('.', yourData) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE LEN(CAST(yourData AS NVARCHAR(MAX)))-1 = LEN(REPLACE(CAST(yourData AS NVARCHAR(MAX)) COLLATE Latin1_General_BIN2,'.',''));

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LEN = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE CHARINDEX('.', yourData COLLATE Latin1_General_BIN2, CHARINDEX('.', yourData COLLATE Latin1_General_BIN2) + 1) = 0;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for CHARINDEX with COLLATE = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE PARSENAME(CAST(yourData AS NVARCHAR(MAX)),3) IS NULL

AND PARSENAME(CAST(yourData AS NVARCHAR(MAX)), 2) IS NOT NULL;

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for PARSENAME = %s',0,1,@Duration) WITH NOWAIT;

Duration for ugly xml split = 00:00:47:197

Duration for CHARINDEX = 00:00:07:593

Duration for LEN = 00:00:08:163

Duration for CHARINDEX with COLLATE = 00:00:04:787

Duration for PARSENAME = 00:00:05:193

Luis Cazares (10/25/2012)
Davin21 (10/25/2012)
How about this?
SELECT *
FROM #testenvironment
WHERE PARSENAME(CAST(yourdata AS NVARCHAR(MAX)),3) IS NULL
I had the same idea, but I added an extra condition because your query will return results with no period (or dot) and with more than 3.

I've got the agree with Luis, it's a good idea but it could return incorrect results.

Forever trying to learn
My blog - http://www.cadavre.co.uk/
For better, quicker answers on T-SQL questions, click on the following...http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better, quicker answers on SQL Server performance related questions, click on the following...http://www.sqlservercentral.com/articles/SQLServerCentral/66909/

mickyT SSChampion Points: 10360 More actions · Answer 14

Hi

I thought I would add in a LIKE query to see how that compared. It wasn't as bad as I thought it would be.

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE yourData like '%.%' and yourData not like '%.%.%';

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LIKE = %s',0,1,@Duration) WITH NOWAIT;

DBCC FREEPROCCACHE WITH NO_INFOMSGS;

DBCC DROPCLEANBUFFERS WITH NO_INFOMSGS;

SELECT @StartTime = GETDATE();

SELECT @HOLDER = ID

FROM #testEnvironment

WHERE yourData COLLATE Latin1_General_BIN2 like '%.%' and yourData COLLATE Latin1_General_BIN2 not like '%.%.%';

SELECT @Duration = CONVERT(CHAR(12),GETDATE()-@StartTime,114);

RAISERROR('Duration for LIKE = %s',0,1,@Duration) WITH NOWAIT;

And got the following

Duration for CHARINDEX = 00:00:09:103

Duration for LEN = 00:00:10:790

Duration for CHARINDEX with COLLATE = 00:00:06:507

Duration for PARSENAME = 00:00:07:717

Duration for LIKE = 00:00:10:703

Duration for LIKE with COLLATE = 00:00:06:517