SQL 增删改查 复习

首先创建两张表

 1   CREATE TABLE Teacher
 2   (
 3         Id      INT IDENTITY(1,1) NOT NULL    PRIMARY KEY,
 4         Name    VARCHAR(10)    NOT NULL,
 5   );
 6 
 7 
 8   CREATE TABLE Student
 9   (
10         Id        INT IDENTITY(1,1) NOT NULL PRIMARY KEY,
11         TeacherID    INT NOT NULL FOREIGN KEY REFERENCES Teacher(Id),
12         Name    VARCHAR(10)    NOT NULL,
13         Age        INT    NOT NULL,
14   );

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