按类别分组的SQL查询
使用SQL Server 2016 我有下表:按类别分组的SQL查询,sql,sql-server,Sql,Sql Server,使用SQL Server 2016 我有下表: Action Id Epic Due Date First Name Action 1 Epic 1 27-Feb-19 Tom Action 2 Epic 2 28-Feb-19 John Action 3 Epic 3 1-Mar-19 Ana Action 4 Epic 3 15-Apr-19 Ana 是否可以设计具有以下输出的查询 Action/Epic Due Dat
Action Id Epic Due Date First Name
Action 1 Epic 1 27-Feb-19 Tom
Action 2 Epic 2 28-Feb-19 John
Action 3 Epic 3 1-Mar-19 Ana
Action 4 Epic 3 15-Apr-19 Ana
是否可以设计具有以下输出的查询
Action/Epic Due Date First Name Type
Epic 1 Epic
Action 1 27-Feb-19 Tom Action
Epic 2 Epic
Action 2 28-Feb-19 John Action
Epic 3 Epic
Action 3 1-Mar-19 Ana Action
Action 4 15-Apr-19 Ana Action
是的,你可以用多种方法中的一种,我想: 桌子 质疑 结果 例如: 解释 按actionid排序后,按顺序为每行指定一个数字 对于每一行,拉出史诗。如果epic重复,则获取最小序列号 获取行动记录 将数据组合在一起 按序列号排序,知道一些史诗和动作将具有相同的序列号,因为它们来自同一行 序列号排序后,按Epic排序,使E位于A之前
仅仅看到原始数据是非常令人困惑的。你能用文字解释一下你想达到什么目的吗?这看起来像是一个UNPIVOT-查一下。我想把第1列和第2列,即[Action ID]和{Epic]合并在一个单独的列中,并添加一个额外的[Type]列,显示类型,即Epic或Action。不完全是UNPIVOT使用选择ActionId+''+EpicId作为[Action Epic],截止日期,名字,Epic作为表格中的类型,或者更好,仍然使用CONCATAmazing,非常感谢zedfoxus的帮助和全面的回答!
create table test (
actionid varchar(100),
epic varchar(100),
duedate varchar(100),
firstname varchar(100)
);
insert into test values
('Action 1', 'Epic 1', '27-Feb-19', 'Tom'),
('Action 2', 'Epic 2', '28-Feb-19', 'John'),
('Action 3', 'Epic 3', '1-Mar-19', 'Ana'),
('Action 4', 'Epic 3', '15-Apr-19', 'Ana');
with data as (
select
row_number() over(order by actionid) as sr,
*
from test
),
compiled as (
select min(sr) as sr, epic as actionid, '' as epic, '' as duedate, '' as firstname, 'Epic' as type
from data group by epic
union all
select *, 'Action' as type from data
)
select actionid, epic, duedate, firstname, type from compiled order by sr, actionid desc
actionid epic duedate firstname type
Epic 1 Epic
Action 1 Epic 1 27-Feb-19 Tom Action
Epic 2 Epic
Action 2 Epic 2 28-Feb-19 John Action
Epic 3 Epic
Action 3 Epic 3 1-Mar-19 Ana Action
Action 4 Epic 3 15-Apr-19 Ana Action