SQL查询的转置结果

Question

如何转换此显示。

SeqNo   Step        Date        By
1       Quoted      2018-03-01  Person1
2       Checked     2018-03-02  Person2
3       Authorized  2018-03-02  Person3
4       Approved    2018-03-03  Person4

进入此显示。

1               2               3               4
Quoted          Checked         Authorized      Approved
2018-03-01      2018-03-02      2018-03-02      2018-03-03
Person1         Person2         Person3         Person4

Answer 1

您必须使用 unpivot和pivot 语法的组合来实现您的结果，并且最终将所有内容施放到同一兼容数据类型中，例如Varchar(MaxChar(

LIVE演示在这里

请参阅下面的查询

create table srcTable (SeqNo int,  Step varchar(10), [Date] date,  [By] varchar(10));
insert into srcTable values
(1,'Quoted','2018-03-01','Person1')
,(2,'Checked','2018-03-02','Person2')
,(3,'Authorized','2018-03-02','Person3')
,(4,'Approved','2018-03-03','Person4')
select [1],[2],[3],[4] from
(
    select 
        SeqNo, 
        [c2]=cast(Step as varchar(max)) ,
        [c3]=cast([Date] as varchar(max)),
        [c4]=cast([By] as varchar(max))
    from 
         srcTable
    )s
unpivot
( 
    value for data in ([c2],[c3],[c4])
)up
pivot
(
    max(value) for SeqNo in ([1],[2],[3],[4])
   )p