Question

我的表中的数据如下：

Author ID  Book Name

A1    Book1

A1    Book2

A2    Book4

A2    Book5

我想将数据表示为

A1  Book1,Book2

A2  Book3,Book5

如果不使用临时表，我该怎么做？

Answer 1

这个问题已经被提问并回答了。在发布之前检查问题。

根据您的专栏编辑此代码。

Reference

   Select T1.Id
    , Stuff(
        (
        Select ', ' + T2.Address
        From MyTable As T2
        Where T2.Id = T1.Id
        Order By T2.Address
        For Xml Path(''), type
        ).value('.', 'nvarchar(max)'), 1, 2, '') As Address
From MyTable As T1
Group By T1.Id

优化SQL查询...

1 个答案: