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How to join three tables in MySQL?
MySQL Interview Questions
SELECTstudent.first_name,student.last_name,course.nameFROMstudentJOINstudent_courseONstudent.id = student_course.student_idJOINcourseONcourse.id = student_course.course_id;You might like this video: C++ Tutorial for Beginners - Using C++ Libraries Watch more here
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FROM table1
JOIN table2 ON table1.primarykey = table2.foreignkey
JOIN table3 ON table2.primarykey = table3.foreignkey
We first join table 1 and table 2 which produce a temporary table with combined data from table1 and table2, which is then joined to table3. This formula can be extended to more than 3 tables to N tables, You just need to make sure that the SQL query should have N-1 join statement in order to join N tables. for joining two tables, we require 1 join statement and for joining 3 tables we need 2 join statements.
Here is a nice diagram that also shows how does different types of JOINs e.g. inner, left outer, right outer and cross joins works in SQL:
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