Create Table stuTable
(
stuName nvarchar(20),
stuAge Int,
stuClass nvarchar (20)
)
Create Table stuScore
(
stuName nvarchar(20),
CNLanguage int,
Math int
)Select stuName, stuAge, stuClass, (Select sum(CNLanguage) From stuScore where stuScore.stuName=stuTable.stuName) as '语文总成绩',(Select sum(Math) From stuScore where stuScore.stuName=stuTable.stuName) as '数学总成绩' from stuTable
(
stuName nvarchar(20),
stuAge Int,
stuClass nvarchar (20)
)
Create Table stuScore
(
stuName nvarchar(20),
CNLanguage int,
Math int
)Select stuName, stuAge, stuClass, (Select sum(CNLanguage) From stuScore where stuScore.stuName=stuTable.stuName) as '语文总成绩',(Select sum(Math) From stuScore where stuScore.stuName=stuTable.stuName) as '数学总成绩' from stuTable
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CREATE TABLE [dbo].[StudentInfo](
[ID] [int] NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[Age] [int] NOT NULL,
[Address] [nvarchar](255) NULL,
[Class] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_StudentInfo] 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].[Grades](
[ID] [int] NOT NULL,
[StudentID] [int] NOT NULL,
[ChineseLang] [float] NULL CONSTRAINT [DF_Grades_ChineseLang] DEFAULT ((0)),
[Math] [float] NULL CONSTRAINT [DF_Grades_Math] DEFAULT ((0)),
[QuizDate] [datetime] NULL,
CONSTRAINT [PK_Grades] PRIMARY KEY CLUSTERED
(
[ID] ASC,
[StudentID] 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].[Grades] WITH CHECK ADD CONSTRAINT [FK_Grades_StudentInfo] FOREIGN KEY([StudentID])
REFERENCES [dbo].[StudentInfo] ([ID])
GO
ALTER TABLE [dbo].[Grades] CHECK CONSTRAINT [FK_Grades_StudentInfo]
//
select si.ID,Name,Age, Address,Class,avg(ChineseLang),avg(Math) from StudentInfo si
inner join Grades g on si.ID = g.StudentID group by si.ID,Name,Age,Address,Class