以逗号分隔在一列中显示前 3 条记录 [英] display the top 3 records in a comma separated in one column

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本文介绍了以逗号分隔在一列中显示前 3 条记录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我遇到了一个问题，我需要在一列中以逗号分隔的字符串显示每个 aId 的前 3 条记录(例如 aId=151 ghghg,ghh, rgtg) 而不是下面的结果.有人可以帮我吗?

I came into problem that I need to display the top 3 records for each aId in a comma separated string in one column (for eg. aId=151 ghghg,ghh, rgtg ) instead of the below result. Can anyone help me please?

Expertise
  ghghg
  ghh
  rgtg
  rtrt
  ghgh
  tyuyu
  fgfg
  yuu
  dfdf
  gtyy
  dfdf
  df
  ssd
  dfd
  dfdf
  fd
  dfdf
  dd
  sdsds
  hghg
  hgh
  sdds
  dff
  rtrr
  fgfg
  bnbnb
  sdss

create table Expertise(
  Id                   bigint      not null identity constraint PK_Expertise primary key,
  aId                  bigint      not null,
  Expertise            varchar(25) not null,
  NoInMonthsExperience int,
  IsPrimary            bit,
  sId                  bigint      constraint DF_Expertise_sId default (0)
)
go

INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (62, 43, N'sds', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (63, 43, N'gg', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (78, 151, N'ghghg', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (79, 151, N'ghh', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (80, 151, N'rgtg', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (81, 151, N'rtrt', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (82, 151, N'ghgh', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (83, 151, N'tyuyu', 6, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (84, 151, N'fgfg', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (85, 151, N'yuu', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (86, 151, N'dfdf', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (87, 151, N'gtyy', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (88, 151, N'dfdf', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (89, 151, N'df', 3, 1, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (90, 151, N'ssd', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (91, 151, N'dfd', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (92, 151, N'dfdf', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (93, 151, N'fd', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (94, 151, N'dfdf', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (95, 151, N'dd', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (97, 151, N'sdsds', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (98, 151, N'hghg', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (99, 151, N'hgh', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (100, 151, N'sdds', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (101, 151, N'dff', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (102, 151, N'rtrr', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (103, 151, N'fgfg', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (104, 151, N'bnbnb', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (105, 151, N'sdss', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (108, 153, N'hgh', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (109, 153, N'ghg', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (110, 153, N'554', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (111, 153, N'ghg', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (112, 153, N'fttr', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (113, 154, N'.NEt', 5, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (114, 154, N'Java', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (115, 154, N'PHP', 3, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (151, 168, N'ghgh', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (152, 168, N'sdssd', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (183, 156, N'909', 7, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (185, 156, N'tyty', 6, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (193, 185, N'asas', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (194, 184, N'.Net', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (195, 184, N'Php', 4, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (196, 168, N'sdsd', 23, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (197, 168, N'wew12', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (198, 168, N'qwqw', 2, 0, 1)
INSERT [dbo].[Expertise] ([Id], [aId], [Expertise], [NoInMonthsExperience], [IsPrimary], [sId]) VALUES (199, 168, N'erer', 24, 0, 1)

推荐答案

使用:

SELECT e.ald,
            STUFF(SELECT TOP 3 
                                              ', '+x.enterprise                
                                    FROM dbo.Enterprise x
                                  WHERE x.ald = e.ald
                                FOR XML PATH ('')),1,2,'')
  FROM ENTERPRISE e
GROUP BY e.ald

这篇关于以逗号分隔在一列中显示前 3 条记录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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