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SQL Puzzle | How to Remove Huge Multiple Spaces from a DB Fields
In this puzzle you have multiple spaces between the characters in the string. Here you have to replace all the multiple and consecutive spaces with a single space.
Please check out the sample input values and sample expected output below.
Sample Input
Id | Vals |
---|---|
1 | ABC DEF K |
2 | FGR |
3 | FG T |
4 | A |
5 | Pawan |
6 | A |
7 | A |
Expected Output
Id | OldVals | ValueAfterRemovingSpaces |
---|---|---|
1 | ABC DEF K | ABC DEF K |
2 | FGR | FGR |
3 | FG T | FG T |
4 | A | A |
5 | Pawan | Pawan |
6 | A | A |
7 | A | A |
Script
Use below script to create table and insert sample data into it.
-- -- CREATE TABLE testSpaces ( Id INT ,Vals VARCHAR(MAX) ) GO INSERT INTO testSpaces VALUES (1,'ABC DEF K'), (2,' FGR'), (3,'FG T'), (4,' A '), (5,'Pawan'), (6,' A '), (7,'A ') GO SELECT * FROM testSpaces -- -- |
Rules/Restrictions
The solution should be should use “SELECT” statement or “CTE”.
Add your solution(s) in the comments section or send you solution(s) to pawankkmr@gmail.com
Solution 1
-- IF OBJECT_ID('tempdb..#ills') IS NOT NULL DROP TABLE #ills IF OBJECT_ID('tempdb..#Final') IS NOT NULL DROP TABLE #Final CREATE TABLE #Final ( Id INT , OldVals VARCHAR(MAX) , ValueAfterRemovingSpaces VARCHAR(MAX) ) SELECT * INTO #ills FROM testSpaces DECLARE @Id AS INT DECLARE @Val AS VARCHAR(MAX) DECLARE @Curr AS VARCHAR(1) DECLARE @Start AS INT DECLARE @End AS INT WHILE EXISTS(SELECT TOP 1 1 FROM #ills) BEGIN SELECT TOP 1 @Val = Vals , @Id = Id FROM #ills SET @Val = LTRIM(RTRIM(@Val)) IF CHARINDEX(' ', @Val , 0) > 0 BEGIN DECLARE @finalString AS VARCHAR(MAX) = '' SELECT @finalString = STUFF((SELECT ' ' + SplittedString FROM ( SELECT SplittedString FROM ( SELECT CAST('<A>'+ REPLACE(@Val,' ','</A><A>')+ '</A>' AS XML) Xmlcol ) s CROSS apply ( SELECT ProjectData.D.value('.', 'VARCHAR(MAX)') as SplittedString FROM s.xmlcol.nodes('A') as ProjectData(D) )a WHERE SplittedString <> '' )k FOR XML PATH('')),1,1,'') INSERT INTO #Final SELECT @Id , @Val , @finalString END ELSE BEGIN INSERT INTO #Final SELECT @Id, @Val ,@Val END DELETE FROM #ills WHERE Id = @Id END SELECT * FROM #Final -- |
Add a comment if you have any other solution in mind. I would love to learn it. We all need to learn.
Enjoy !!! Keep Learning
Pawan Khowal
Http://MSBISkills.com
Hi Pawan ,
You can use the below statement to remove the spaces.
SELECT ID,RTRIM(LTRIM(Replace(Vals,’ ‘,”))) Vals FROM testSpaces
Regards,
Mahesh
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Hi Mahesh,
This is not working. Please check the expected output.
Pawan
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i am getting the expected output .. would you please share , where it is showing the wrong ..
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Input – ABC[_________________________________]DEF[__________________________]K
Output from your query – ABCDEFK
Ouptut we need- ABC DEF K
[_________________________________] – Spaces.
Hope it helps !
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DECLARE @testSpaces table
(
Id INT
,Vals VARCHAR(MAX)
)
INSERT INTO @testSpaces VALUES
(1,’ABC DEF K’),
(2,’ FGR’),
(3,’FG T’),
(4,’ A ‘),
(5,’Pawan’),
(6,’ A ‘),
(7,’A ‘)
WHILE EXISTS(SELECT TOP 1 NULL FROM @testSpaces where CHARINDEX(‘ ‘,Vals)>0)
BEGIN
UPDATE @testSpaces
SET Vals = RTRIM(LTRIM(SUBSTRING(Vals,1,CHARINDEX(‘ ‘,Vals))+”+SUBSTRING(Vals,CHARINDEX(‘ ‘,Vals)+2,100)))
where CHARINDEX(‘ ‘,Vals)>0
END
SELECT * FROM @testSpaces
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Create Table #temp
(
Id INT
,Vals VARCHAR(MAX)
)
Insert Into #Temp
Select *
From TestSpaces
Declare @cnt int
Set @cnt= 1
while (Select max(CHARINDEX(‘ ‘, vals, 1)) From #Temp ) > 0
Begin
Update #temp
Set vals = Replace(vals, ‘ ‘, ‘ ‘)
Where CHARINDEX(‘ ‘, vals, 1) > 0
Set @cnt = @cnt + 1
End
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;WITH cte1 as ( SELECT SUBSTRING(Vals, 1, 1) a, 1 as i, 1 as b, Id FROM @testSpaces UNION ALL SELECT SUBSTRING(Vals, i+1, 1) a, i+1, CASE WHEN a = ” AND SUBSTRING(Vals, i+1, 1) = ” THEN b + 1 ELSE 1 END, cte.Id FROM cte1 JOIN @testSpaces cte ON cte.Id = cte1.Id WHERE i < DATALENGTH(Vals) ) SELECT STUFF(( SELECT a + '' FROM cte1 WHERE b = 1 AND Id = tb.Id ORDER BY Id,i FOR XML PATH(''),TYPE).value('(./text())[1]','varchar(max)'),1,0,'') as a FROM cte1 tb GROUP BY Id
On Mon, Dec 26, 2016 at 3:52 PM, Improving my SQL BI Skills wrote:
> Pawan Kumar Khowal posted: “SQL Puzzle | How to Remove Huge Multiple > Spaces from a DB Fields In this puzzle you have multiple spaces between the > characters in the string. Here you have to replace all the multiple and > consecutive spaces with a single space. Please check out the” >
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