我有一个称为任务的表,该表列出了工作人员可以完成的不同任务。然后我有一个关系表,它将完成的任务链接到工作人员。 我正在尝试编写基于工作人员ID将任务分组为列表的查询,但是该查询给了我以下错误(请参见下文)。
Column 'mater.dbo.worker_task_completion.FK_task_id' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
表格
CREATE TABLE [dbo].[tasks]
(
[task_id] [int] IDENTITY(1,1) NOT NULL,
[name] [nvarchar](50) NOT NULL,
[icon] [nvarchar](max) NULL,
[isActive] [int] NOT NULL,
[time] [int] NOT NULL,
CONSTRAINT [PK_tasks] PRIMARY KEY CLUSTERED
(
[task_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
CREATE TABLE [dbo].[worker_task_completion]
(
[FK_worker_id] [int] NOT NULL,
[FK_task_id] [int] NOT NULL,
[update_date] [datetime] NOT NULL,
CONSTRAINT [PK_worker_task_completion] PRIMARY KEY CLUSTERED
(
[FK_worker_id] ASC,
[FK_task_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
查询
SELECT top 100 wtc.FK_worker_id,
tasks = Stuff((SELECT ', ' + dbo.tasks.NAME
FROM dbo.tasks
WHERE dbo.tasks.task_id =
wtc.FK_task_id
FOR xml path ('')), 1, 1, '')
FROM dbo.worker_task_completion AS wtc
LEFT JOIN dbo.tasks AS tc
ON tc.task_id = wtc.fk_task_id
-- WHERE wtc.FK_worker_id IN ()
GROUP BY wtc.FK_worker_id
答案 0 :(得分:1)
嗯。您不能将非聚合列用于关联子句。解决方案是将JOIN
移到子查询中:
SELECT top 100 wtc.FK_worker_id,
stuff((SELECT ', ' + t.NAME
FROM dbo.worker_task_completion wtc2 JOIN
dbo.tasks t
ON t.task_id = wtc2.FK_task_id
WHERE wtc2.FK_worker_id = wtc.FK_worker_id
FOR xml path ('')
), 1, 2, ''
) as tasks
FROM (SELECT DISTINCT wtc.FK_worker_id
FROM dbo.worker_task_completion wtc
) wtc
-- WHERE wtc.FK_worker_id IN ()
请注意,我更改了STUFF()
的第二个参数。大概是要删除空格和逗号。
答案 1 :(得分:1)
;WITH CTE_worker_task_completion
AS (SELECT [FK_worker_id]
,[FK_task_id]
FROM [dbo].[worker_task_completion])
------------------------------------------
SELECT [WT].[FK_worker_id]
,[Task]=Stuff(
(
SELECT ', '+[T].[Name]
FROM [dbo].[tasks] AS [T]
INNER JOIN CTE_worker_task_completion AS [WTC]
ON [T].[Task_ID]=[WTC].[Task_ID]
Where [WT].[Worker_ID]=[WTC].[Worker_ID]
ORDER BY [T].[Name] FOR XML PATH('')
),1,1,'')
FROM CTE_worker_task_completion AS [WT]
GROUP BY [WT].[FK_worker_id];