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Get Column Data To one Row

Here i will explain how to get column data into one row.

CREATE TABLE [dbo].[EMP_MAST](
[EMP_CODE] [varchar](10) NULL,
[NAME] [varchar](10) NULL)

first of all create table and insert record in it.

INSERT INTO EMP_MAST (EMP_CODE,NAME) VALUES('NJS','Nikhil')
INSERT INTO EMP_MAST (EMP_CODE,NAME) VALUES('BNS','ABC')

after that run this query.
Declare @Str VArchar(Max)

SELECT @Str =Coalesce(@Str +','+ EMP_CODE,EMP_CODE)FROM [dbo].[EMP_MAST]

select @Str

OUTPUT: NJS,BNS
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