前言：
而今姐妹们对“sql将多条记录用一条展示”大体比较关怀，你们都想要分析一些“sql将多条记录用一条展示”的相关内容。那么小编同时在网上网罗了一些对于“sql将多条记录用一条展示””的相关知识，希望我们能喜欢，朋友们快快来学习一下吧！一、引言
现实工作中，有一些很特别的需求：在一个汇总表中，需要显示明细数据。因为是在汇总表中，所以明细数据只能显示在某一列中，这个列，就是多行数据合并为一行之后的结果。
二、测试数据
CREATE TABLE [dbo].[Score]( [ID] [varchar] (32) COLLATE Chinese_PRC_CI_AS NULL, [Name] [varchar] (20) COLLATE Chinese_PRC_CI_AS NULL, [Subject] [varchar] (20) COLLATE Chinese_PRC_CI_AS NULL, [Value] [numeric] (4, 1) NULL) ON [PRIMARY]GOINSERT INTO SCORE ([ID],[NAME],[SUBJECT],[VALUE]) VALUES ('1001','张三','语文',86)INSERT INTO SCORE ([ID],[NAME],[SUBJECT],[VALUE]) VALUES ('1001','张三','数学',88)INSERT INTO SCORE ([ID],[NAME],[SUBJECT],[VALUE]) VALUES ('1002','李四','语文',89)INSERT INTO SCORE ([ID],[NAME],[SUBJECT],[VALUE]) VALUES ('1002','李四','数学',90)三、实现方法3.1、STUFF函数代码如下：
SELECT ID,[NAME], STUFF ( ( SELECT ','+[SUBJECT]+':'+CAST([VALUE] AS VARCHAR(MAX)) FROM SCORE WHERE (ID=Result.ID) FOR XML PATH(''),TYPE).value('(./text())[1]','VARCHAR(MAX)' ),1,1,'' ) AS NameValuesFROM SCORE ResultGROUP BY ID,[NAME]ORDER BY ID3.2、GROUP_CONCAT函数GROUP_CONCAT并非SQL Server自带函数，本文使用的是来源于网络自由软件创建的托管代码。GroupConcatInstallation.sql为函数安装，GroupConcatUninstallation.sql为函数卸载。
/*GROUP_CONCAT string aggregate for SQL Server - (C) 2011 Orlando ColamatteoThis program is free software: you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation, either version 3 of the License, or any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.See for a copy of the GNU General Public License.*//*Installation script for GROUP_CONCAT functions. Tested in SSMS 2008R2.*/SET NOCOUNT ON ;GO-- !! MODIFY TO SUIT YOUR TEST ENVIRONMENT !!--USE GroupConcatTestGO--------------------------------------------------------------------------------------------------------------------------------- Turn advanced options onEXEC sys.sp_configure @configname = 'show advanced options', @configvalue = 1 ;GORECONFIGURE WITH OVERRIDE ;GO-- Enable CLREXEC sys.sp_configure @configname = 'clr enabled', @configvalue = 1 ;GORECONFIGURE WITH OVERRIDE ;GO-------------------------------------------------------------------------------------------------------------------------------SET ANSI_NULLS, ANSI_PADDING, ANSI_WARNINGS, ARITHABORT, QUOTED_IDENTIFIER ON;SET CONCAT_NULL_YIELDS_NULL, NUMERIC_ROUNDABORT OFF;GOIF EXISTS (SELECT * FROM tempdb..sysobjects WHERE id=OBJECT_ID('tempdb..#tmpErrors')) DROP TABLE #tmpErrorsGOCREATE TABLE #tmpErrors (Error int)GOSET XACT_ABORT ONGOSET TRANSACTION ISOLATION LEVEL READ COMMITTEDGOBEGIN TRANSACTIONGO-------------------------------------------------------------------------------------------------------------------PRINT N'Creating [GroupConcat]...';GOCREATE ASSEMBLY [GroupConcat] AUTHORIZATION [dbo] FROM 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WITH PERMISSION_SET = SAFE;GOIF @@ERROR <> 0 AND @@TRANCOUNT > 0 BEGIN ROLLBACK; ENDIF @@TRANCOUNT = 0 BEGIN INSERT INTO #tmpErrors (Error) VALUES (1); BEGIN TRANSACTION; ENDGOEXEC sys.sp_addextendedproperty @name = N'URL', @value = N';, @level0type = N'ASSEMBLY', @level0name = N'GroupConcat'GO-------------------------------------------------------------------------------------------------------------------PRINT N'Creating [dbo].[GROUP_CONCAT_D]...';GOCREATE AGGREGATE [dbo].[GROUP_CONCAT_D](@VALUE NVARCHAR (4000), @DELIMITER NVARCHAR (4)) RETURNS NVARCHAR (MAX) EXTERNAL NAME [GroupConcat].[GroupConcat.GROUP_CONCAT_D];GOIF @@ERROR <> 0 AND @@TRANCOUNT > 0 BEGIN ROLLBACK; ENDIF @@TRANCOUNT = 0 BEGIN INSERT INTO #tmpErrors (Error) VALUES (1); BEGIN TRANSACTION; ENDGO-------------------------------------------------------------------------------------------------------------------PRINT N'Creating [dbo].[GROUP_CONCAT_S]...';GOCREATE AGGREGATE [dbo].[GROUP_CONCAT_S](@VALUE NVARCHAR (4000), @SORT_ORDER TINYINT) RETURNS NVARCHAR (MAX) EXTERNAL NAME [GroupConcat].[GroupConcat.GROUP_CONCAT_S];GOIF @@ERROR <> 0 AND @@TRANCOUNT > 0 BEGIN ROLLBACK; ENDIF @@TRANCOUNT = 0 BEGIN INSERT INTO #tmpErrors (Error) VALUES (1); BEGIN TRANSACTION; ENDGO-------------------------------------------------------------------------------------------------------------------PRINT N'Creating [dbo].[GROUP_CONCAT_DS]...';GOCREATE AGGREGATE [dbo].[GROUP_CONCAT_DS](@VALUE NVARCHAR (4000), @DELIMITER NVARCHAR (4), @SORT_ORDER TINYINT) RETURNS NVARCHAR (MAX) EXTERNAL NAME [GroupConcat].[GroupConcat.GROUP_CONCAT_DS];GOIF @@ERROR <> 0 AND @@TRANCOUNT > 0 BEGIN ROLLBACK; ENDIF @@TRANCOUNT = 0 BEGIN INSERT INTO #tmpErrors (Error) VALUES (1); BEGIN TRANSACTION; ENDGO-------------------------------------------------------------------------------------------------------------------PRINT N'Creating [dbo].[GROUP_CONCAT]...';GOCREATE AGGREGATE [dbo].[GROUP_CONCAT](@VALUE NVARCHAR (4000)) RETURNS NVARCHAR (MAX) EXTERNAL NAME [GroupConcat].[GroupConcat.GROUP_CONCAT];GOIF @@ERROR <> 0 AND @@TRANCOUNT > 0 BEGIN ROLLBACK; ENDIF @@TRANCOUNT = 0 BEGIN INSERT INTO #tmpErrors (Error) VALUES (1); BEGIN TRANSACTION; ENDGO-------------------------------------------------------------------------------------------------------------------IF EXISTS (SELECT * FROM #tmpErrors) ROLLBACK TRANSACTIONGOIF @@TRANCOUNT>0 BEGINPRINT N'The transacted portion of the database update succeeded.'COMMIT TRANSACTIONENDELSE PRINT N'The transacted portion of the database update failed.'GODROP TABLE #tmpErrors-------------------------------------------------------------------------------------------------------------------GO/*GROUP_CONCAT string aggregate for SQL Server - (C) 2011 Orlando ColamatteoThis program is free software: you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation, either version 3 of the License, or any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.See for a copy of the GNU General Public License.*//*Uninstallation script for GROUP_CONCAT functions. Tested in SSMS 2008R2.*/SET NOCOUNT ON ;GO-- !! MODIFY TO SUIT YOUR TEST ENVIRONMENT !!--USE TESTGO-------------------------------------------------------------------------------------------------------------------------------IF EXISTS ( SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GROUP_CONCAT]') AND type = N'AF' ) DROP AGGREGATE [dbo].[GROUP_CONCAT]GOIF EXISTS ( SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GROUP_CONCAT_D]') AND type = N'AF' ) DROP AGGREGATE [dbo].[GROUP_CONCAT_D]GOIF EXISTS ( SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GROUP_CONCAT_DS]') AND type = N'AF' ) DROP AGGREGATE [dbo].[GROUP_CONCAT_DS]GOIF EXISTS ( SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GROUP_CONCAT_S]') AND type = N'AF' ) DROP AGGREGATE [dbo].[GROUP_CONCAT_S]GOIF EXISTS ( SELECT * FROM sys.assemblies asms WHERE asms.name = N'GroupConcat' AND is_user_defined = 1 ) DROP ASSEMBLY [GroupConcat]GO
代码如下：
SELECT ID,[NAME],dbo.GROUP_CONCAT([SUBJECT]+':'+CAST([VALUE] AS VARCHAR(MAX))) AS NameValuesFROM SCOREGROUP BY ID,[NAME]ORDER BY ID四、运行结果
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标签： #sql将多条记录用一条展示 #sql下一行减上一行
