How to remove the long space in the sentence using SQL SERVER

Step 1:- Example sentence

'Hello               Welcome   to   lokeshasp.blogspot.com'

Step2:-Write the below code

DECLARE @str varchar(150)

SET @str='Hello               Welcome   to   lokeshasp.blogspot.com'

Select REPLACE(REPLACE(REPLACE(@str,' ','[]'),'][',''),'[]',' ')

OutPut :-

Hello Welcome to lokeshasp.blogspot.com

Explanation

DECLARE @str varchar(150)

SET @str='Hello               Welcome   to   lokeshasp.blogspot.com'

Select REPLACE(@str,' ','{}')

O/P:-  Hello{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}Welcome{}{}{}to{}{}{}lokeshasp.blogspot.com

Select REPLACE(REPLACE(@str,' ','{}'),'}{','')

O/P:-   Hello{}Welcome{}to{}lokeshasp.blogspot.com

Select REPLACE(REPLACE(REPLACE(@str,' ','{}'),'}{',''),'{}',' ')

O/P:-   Hello Welcome to lokeshasp.blogspot.com

Full Code

DECLARE @str varchar(150)

SET @str='Hello               Welcome   to   lokeshasp.blogspot.com'

Select REPLACE(@str,' ','{}')

Select REPLACE(REPLACE(@str,' ','{}'),'}{','')

Select REPLACE(REPLACE(REPLACE(@str,' ','{}'),'}{',''),'{}',' ')