http://iamzombie.tistory.com/35 http://www.slideshare.net/ahmadjamshidhashimi/my-sql-join-union http://stackoverflow.com/questions/905379/what-is-the-difference-between-join-and-union] https://www.essentialsql.com/what-is-the-difference-between-a-join-and-a-union/ Both Joins and UNIONS can be used to combine data from two or more tables.Whereas a join is used to combine columns from different ta..