在 sql server 中分隔的逗号的东西

FOR XML PATH 和 STUFF 将多行连接成一行：

  select distinct t1.id,
      STUFF(
             (SELECT ', ' + convert(varchar(10), t2.date, 120)
              FROM yourtable t2
              where t1.id = t2.id
              FOR XML PATH (''))
              , 1, 1, '')  AS date
    from yourtable t1;