Mybatis学习——一对一关联表查询

1.SQL语句建表

 1 CREATE TABLE teacher(
 2 t_id INT PRIMARY KEY AUTO_INCREMENT, t_name VARCHAR(20)
 3 );
 4 CREATE TABLE class(
 5 c_id INT PRIMARY KEY AUTO_INCREMENT, c_name VARCHAR(20),
 6 teacher_id INT
 7 );
 8 ALTER TABLE class ADD CONSTRAINT fk_teacher_id FOREIGN KEY (teacher_id) REFERENCES teacher(t_id);
 9 INSERT INTO teacher(t_name) VALUES('LS1'); INSERT INTO teacher(t_name) VALUES('LS2');
10 INSERT INTO class(c_name, teacher_id) VALUES('bj_a', 1); INSERT INTO class(c_name, teacher_id) VALUES('bj_b', 2);

sql