多表查询 INNER JOIN ON WHERE

SELECT
*
FROM
STUDENT_INFO si
INNER JOIN CLASS_INFO ci on si.CLASS_INFO_ID = ci.ID
INNER JOIN TEACHER_INFO ti ON si.TEACHER_INFO_ID = ti.ID



SELECT
*
FROM
STUDENT_INFO si
INNER JOIN TEACHER_INFO ti ON si.TEACHER_INFO_ID = ti.ID
WHERE ti.ID='50e6981747281048c48b5fb3'