В чем разница между следующими запросами? Они дают мне тот же результат.Различие между моими SQL-запросами
SELECT student. * ,
department.department_name,
semester.semester_name
FROM (
student
LEFT JOIN department ON student.student_id = department.department_id
LEFT JOIN semester ON student.student_id = semester.semester_id
)
SELECT student. * ,
department.department_name,
semester.semester_name
FROM (
student
LEFT JOIN department ON student.department_id = department.department_id
LEFT JOIN semester ON student.semester_id = semester.semester_id
)
SELECT student. * ,
department.department_name,
semester.semester_name
FROM (
student
LEFT JOIN department ON student.student_id = student.student_id
LEFT JOIN semester ON student.student_id = student.student_id
)
SELECT student. * , department.department_name, semester.semester_name
FROM (
student
LEFT JOIN department ON student.department_id = student.student_id
LEFT JOIN semester ON student.semester_id = student.student_id
)
ok thanks @halfer – user3215780