sql-server - 逗号分隔列表作为单个字符串，T-SQL

Question

我的 T-SQL 查询生成以下结果集

ID        Date
756 2011-08-29
756 2011-08-31
756 2011-09-01
756 2011-09-02

如何进行这样的转换

ID                Date
756 2011-08-29, 2011-08-31, 2011-09-01, 2011-09-02

如有任何建议，我们将不胜感激。

Answer 1

您可以使用 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;

参见SQL Fiddle with Demo