创建表

--创建测试表  
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[TestRows2Columns]') AND type in (N'U'))  
DROP TABLE [dbo].[TestRows2Columns]  
GO  
CREATE TABLE [dbo].[TestRows2Columns](  
    [Id] [int] IDENTITY(1,1) NOT NULL,  
    [UserName] [nvarchar](50) NULL,  
    [Subject] [nvarchar](50) NULL,  
    [Source] [numeric](18, 0) NULL  
) ON [PRIMARY]  
GO  
  
--插入测试数据  
INSERT INTO [TestRows2Columns] ([UserName],[Subject],[Source])   
    SELECT N'张三',N'语文',60  UNION ALL  
    SELECT N'李四',N'数学',70  UNION ALL  
    SELECT N'王五',N'英语',80  UNION ALL  
    SELECT N'王五',N'数学',75  UNION ALL  
    SELECT N'王五',N'语文',57  UNION ALL  
    SELECT N'李四',N'语文',80  UNION ALL  
    SELECT N'张三',N'英语',100  
GO  
  
SELECT * FROM [TestRows2Columns]