I have a list of people’s ID and their first name, and a list of people’s ID and their surname. Some people don’t have a first name and some don’t have a surname; I’d like to do a full outer join on the two lists. So the following lists: ID FirstName — ——— 1 John … Read more
I want to do a full outer join in MySQL. Is this possible? Is a full outer join supported by MySQL? 15 s 15 You don’t have full joins in MySQL, but you can sure emulate them. For a code sample transcribed from this Stack Overflow question you have: With two tables t1, t2: SELECT * … Read more
What is the difference between LEFT JOIN and LEFT OUTER JOIN? 12 As per the documentation: FROM (Transact-SQL): <join_type> ::= [ { INNER | { { LEFT | RIGHT | FULL } [ OUTER ] } } [ <join_hint> ] ] JOIN The keyword OUTER is marked as optional (enclosed in square brackets). In this … Read more
This question already has answers here: What is the difference between “INNER JOIN” and “OUTER JOIN”? (27 answers) Closed 6 years ago. What’s the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN in MySQL? 3 Reading this original article on The Code Project will help you a lot: Visual Representation of SQL … Read more
Also how do LEFT JOIN, RIGHT JOIN and FULL JOIN fit in? 2 27 Assuming you’re joining on columns with no duplicates, which is a very common case: An inner join of A and B gives the result of A intersect B, i.e. the inner part of a Venn diagram intersection. An outer join of … Read more
