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

我怎样才能像这样转换

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

任何建议都将不胜感激。

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;

请参阅SQL Fiddle with Demo