Is there a code for concactenantion in SQL? -

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i have record in database:

column1          column2      1                   1               b     1               c

and result be:

column1           result      1              abc

i want query not use loop :)

for ms sql use:

declare @result varchar(1000) set @result = ''  select           @result = (@result  + column2)  mytable column1 = 1   select @result

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