我需要将查询结果的按行数据安排动态地转换为按列结果

Question

I have three tables country , countrycontent and language and the create and insert statements for each table is shown in following script (you can directly create and insert data by just executing following script)

   CREATE TABLE [dbo].[country]([id] [int] IDENTITY(1,1) NOT NULL,  [flagdeleted] [bit] NULL,
     CONSTRAINT [PK_country] PRIMARY KEY CLUSTERED 
    ([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];

---

CREATE TABLE [dbo].[language](
    [id] [int] IDENTITY(1,1) NOT NULL,[name] [nvarchar](100) NULL,
    [code] [nchar](10) NULL,[flagdeleted] [bit] NULL,
 CONSTRAINT [PK_language] PRIMARY KEY CLUSTERED 
([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];

---

 SET ANSI_NULLS ON
    GO
    SET QUOTED_IDENTIFIER ON
    GO
    CREATE TABLE [dbo].[countrycontent](
        [id] [int] IDENTITY(1,1) NOT NULL,[countryid] [int] NULL,
        [languageid] [int] NULL,[name] [nvarchar](250) NULL,[flagdeleted] [bit] NULL,
     CONSTRAINT [PK_countrycontent] PRIMARY KEY CLUSTERED 
    ([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]
    GO
    ALTER TABLE [dbo].[countrycontent]  WITH CHECK ADD  CONSTRAINT [FK_countrycontent_country] 

    FOREIGN KEY([countryid])
    REFERENCES [dbo].[country] ([id])
    GO
    ALTER TABLE [dbo].[countrycontent] CHECK CONSTRAINT [FK_countrycontent_country]
    GO
    ALTER TABLE [dbo].[countrycontent]  WITH CHECK ADD  CONSTRAINT [FK_countrycontent_language] 

    FOREIGN KEY([languageid])
    REFERENCES [dbo].[language] ([id])
    GO
    ALTER TABLE [dbo].[countrycontent] CHECK CONSTRAINT [FK_countrycontent_language]
    GO

---

Inserting data in all tables

 INSERT INTO country(flagdeleted) VALUES(0),(0),(0),(0),(0),(0),(0),(0);

INSERT INTO [language]([name],code,flagdeleted)
VALUES ('English','EN',0),
       ('Hindi','HI',0),('Polish','PO',0),
       ('Chinese','CH',0),('Russian','RU',0);

INSERT INTO countrycontent(countryid,languageid,flagdeleted,name) VALUES
(1,1,0,N'India'),(1,2,0,N'भारत'),(1,3,0,N'Indie'),(1,4,0,N'印度'),(1,5,0,N'Индия'),
(2,1,0,N'Australia'),(2,2,0,N'ऑस्ट्रेलिया'),(2,3,0,N'Australia'),(2,4,0,N'澳大利亚'),(2,5,0,N'Австралия'),
(3,1,0,N'China'),(3,2,0,N'चीन'),(3,3,0,N'Chiny'),(3,4,0,N'中国'),(3,5,0,N'Китай'),
(4,1,0,N'Canada'),(4,2,0,N'कनाडा'),(4,3,0,N'Kanada'),(4,4,0,N'加拿大'),(4,5,0,N'Канада'),
(5,1,0,N'Japan'),(5,2,0,N'जापान'),(5,3,0,N'Japonia'),(5,4,0,N'日本'),
(6,1,0,N'Russia'),(6,2,0,N'रूस'),(6,3,0,N'Rosja'),
(7,1,0,N'South Africa'),(7,2,0,N'दक्षिण अफ्रीका'),
 (8,1,0,N'United Kingdom'); 

---

I need Output of the Query/stored procedure as shown in below image:

---

I have created the stored procedure as follow.

---

CREATE PROCEDURE GetCountryList 
AS
BEGIN
    SET NOCOUNT ON;

    SELECT c.id AS countryid, l.code languagecode , cc.NAME 
    FROM country c 
         INNER JOIN countrycontent cc ON c.id= cc.countryid AND c.flagdeleted = 0 AND cc.flagdeleted =0
         INNER JOIN [language] l ON l.id = cc.languageid AND l.flagdeleted =0
END
GO

Here make sure that, the no. of languages in languages table may increase the country in country table may increase

In both case the Query/stored procedure should work properly without any changes. I mean Query/stored procedure should dynamic.

Answer 1

You can use pivot operator and write a query as:

DECLARE @cols AS NVARCHAR(MAX),
@query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(name) 
                    from [language]
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

set @query = 'SELECT countryid,' + @cols + ' 
            from 
            (
                select cc.countryid ,cc.name as countrycontentname, [language].name as languagename
                from countrycontent cc
                inner join [language] on cc.languageid = [language].id 
            ) T 
            pivot 
            (
                max (countrycontentname)
                for languagename in (' + @cols + ')
            ) p '

execute sp_executesql @query;

Answer 2

Bhavesh I think you want this

DECLARE @cols AS NVARCHAR(MAX),
@cols1 AS NVARCHAR(MAX),
@query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT ',' + QUOTENAME(rtrim(ltrim(code))) 
                    from [language] order by id
            FOR XML PATH(''), TYPE 
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')


select @cols1 = STUFF((SELECT  'Isnull(' + QUOTENAME(rtrim(ltrim(code))) + ','''') as '  + QUOTENAME(rtrim(ltrim(code))) + ','  
                    from [language] Order by id
            FOR XML PATH(''), TYPE 
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,0,'')

Set @cols1 = Left(@cols1 , LEN(@cols1) - 1) 


set @query = 'SELECT countryid,' + @cols1 + ' 
            from 
            (
                select cc.countryid ,cc.name as countrycontentname, [language].code as languagename
                from countrycontent cc
                inner join [language] on cc.languageid = [language].id 
            ) T 
            pivot 
            (
                max (countrycontentname)
                for languagename in (' + @cols + ')
            ) p '



execute sp_executesql @query;