如何进行内部联接查询以获取多个选定的表列

Question

我只是制定项目学校的管理。现在我只是查询以检索其他表列。这是我的查询：

ALTER PROCEDURE [dbo].[GetTeacherList]
(
    @teacherid varchar(5) = null,
    @classid varchar(5) = null,
    @sectionid varchar(5) = null,
    @subjectid varchar(5) = null
)
AS
BEGIN

    SET NOCOUNT ON;
    select *,right('00000' + CAST(t.[PK_PID] AS varchar(5)) ,5) as ID, c.ClassName, su.SubjectName, s.SectionName
    from teachers t 

        inner join teacherclassassign tc on t.PK_PID = tc.TeacherID or (t.PK_PID is null and tc.TeacherID is null ) 
        inner join classes c on c.PK_PID = tc.ClassID or (c.PK_PID is not null and tc.ClassID is null)
        inner join sections s on s.PK_PID = tc.SectionID or (s.PK_PID is not null and tc.SectionID is null)
        inner join subjects su on su.PK_PID = tc.SubjectID or (su.PK_PID is not null and tc.SubjectID is null)

    where 1=1

    and (@teacherid is null or tc.[TeacherID] = CONVERT(INT,@teacherid))
    and (@classid is null or tc.[ClassID] = CONVERT(INT,@classid))
    and (@sectionid is null or tc.[SectionID] = CONVERT(INT,@sectionid))
    and (@subjectid is null or tc.[SubjectID] = CONVERT(INT,@subjectid))

    order by t.PK_PID asc
END

如何返回我两行，但是我希望从表教师那里得到所有行。

这里是我想要的行数据：

这里是老师的全部数据：

我如何达到这个结果。请大家帮我。