java.sql.SQLSyntaxErrorException in mybatis - mybatis

Question

The phenomenon and background of the problem encountered
Problems encountered when configuring mybatis and writing tests, an error will be reported as soon as you click to run
problem related code,
#Test
public void findmany() throws IOException
{
InputStream is= Resources.getResourceAsStream("mybatis-config.xml");
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);
SqlSession sqlSession =sqlSessionFactory.openSession();
Map<String,Object> params = new HashMap<>();
params.put("name", "sam");
params.put("major", "");
List<Student> student=sqlSession.selectList("com.javaee.pojo.Student.findmany",params);
System.out.println(student);
Map<String,Object> params2 = new HashMap<>();
params2.put("name", "");
params2.put("major", "math");
student=sqlSession.selectList("com.javaee.pojo.Student.findmany",params2);
System.out.println(student);
Map<String,Object> params3 = new HashMap<>();
params3.put("name", "");
params3.put("major", "");
student=sqlSession.selectList("com.javaee.pojo.Student.findmany",params3);
System.out.println(student);
sqlSession.close();
}
mapper
<select id="findmany"
parameterType="map"
resultType="com.javaee.pojo.Student">
select * from students where name like concat('%',#{name},'%') major like concat('%',#{major},'%')
</select>
Student Class
public class Student {
private int id;
private String name;
private String major;
private String sno;
public String toString()
{
return "Student{"+"id="+id+",sno='"+sno+'\''+",name='"+name+'\''+",major='"+major+'\''+'}';
}
Running results and error content
enter image description here

Answer 1

Missing an AND in your select, try this way:
select * from students where name like concat('%',#{name},'%') AND major like concat('%',#{major},'%')