Inner join is a join that combined tables based on matching tuples, whereas outer join is a join that combined table based on both matched. The former is the shorthand for the latter. Left join and left outer join are one and the same.
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The same can be said about the right join. Inner join gets all records that are common between both tables based on the supplied on clause. I'm pretty new to python and am completely confused by.join() which i have read is the preferred method for concatenating strings.
The fact that when it says inner join, you can be sure of what it does and that it's supposed to be just that, whereas a plain join will leave you, or.
Left join gets all records from the left.
