I have join three table into one table but there different column name but same value.
Student Table
-------------
CV_id name
-------------
LC001 ali
LC002 ahmed
LC003 john
LC004 king
Course Table
-------------
Us_id name
-------------
LC001 physic
LC002 maths
LC003 computer
LC004 chemistry
Bridge
-------------
sid CV_cid
-------------
ti LC001
ni LC002
df LC003
ed LC004
Assuming you want to join by the id
fields:
select s.name student_name, c.name course_name, b.sid from student s
join course c
on c.us_id = s.cv_id
join bridge b
on b.cv_id = s.cv_id
Here is some information about SQL joins
Use JOIN
to achieve your result
SELECT ST.CV_id, ST.name, CO.name, BR.`sid`
FROM Student ST
INNER JOIN Course CO ON CO.Us_id = ST.CV_id
INNER JOIN Bridge BR ON BR.CV_cid = ST.CV_id
假设您将第一列的表作为主键。
SELECT t1.col, t2.col, t3.col FROM tbl1 join tbl2 ON tbl1.pk = tbl2.pk join tbl3 ON tbl2.pk = tbl3.pk
YOU CAN USE JOIN
SELECT s.CV_id, s.name, c.name, b.sid
FROM Student s
INNER JOIN Course c ON c.Us_id = s.CV_id
INNER JOIN Bridge b ON b.CV_cid = s.CV_id
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