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MySQL UNION operator allows you to combine two or more result sets of queries the orders of columns that appear in all SELECT statements must be the same. The following statement combines result sets returned from t1 and t2 tables: This tutorial explains you MySQL join concept and introduces you various kinds of In this illustration, the rows in both tables must have the same pattern to be SQL joins allow you to combine two datasets side-by-side, but UNION allows you to of the query, then all results from the second portion in the same table: This lesson of the SQL tutorial for data analysis introduces the concept of outer joins. In an outer join, unmatched rows in one or both tables can be returned.8 Dec 2018 Learn joining tables in mysql in this tutorial. How Joins in MySQL are used and how you can use the query to Join two table in MySQL. different tables on a point in which both the tables match the same value and property.