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declare @Test table (ID int, [NAME] varchar(32), ZIP varchar(12), NTID varchar(2)); insert into @Test (ID, [NAME], ZIP, NTID) values (1, 'Juan', '123', 'H1'), (1, 'Juan', '123', 'H2'), (2, 'John', '456', 'H3'), (2, 'John', '456', 'H4'), (2, 'John', '456', 'H5'); with cte as ( select * , (row_number() over (partition by ID order by NTID) - 1) / 2 rn from @Test ) select ID, [NAME], STRING_AGG(NTID,',') from cte group by ID, [NAME], rn;
ID
NAME
(No column name)
1
Juan
H1,H2
2
John
H3,H4
2
John
H5