What is difference between left join and left outer join in Oracle?

What is difference between left join and left outer join in Oracle?

There really is no difference between a LEFT JOIN and a LEFT OUTER JOIN. Both versions of the syntax will produce the exact same result in PL/SQL. Some people do recommend including outer in a LEFT JOIN clause so it’s clear that you’re creating an outer join, but that’s entirely optional.

What is the difference between inner join and left join?

INNER JOIN: returns rows when there is a match in both tables. LEFT JOIN: returns all rows from the left table, even if there are no matches in the right table. RIGHT JOIN: returns all rows from the right table, even if there are no matches in the left table.

Why do inner join vs left join?

You’ll use INNER JOIN when you want to return only records having pair on both sides , and you’ll use LEFT JOIN when you need all records from the “left” table, no matter if they have pair in the “right” table or not.

What is difference between inner join and LEFT OUTER JOIN?

The difference between inner join and outer join is as follow: 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 and unmatched tuple.

Is left-join faster then inner join?

You may be interested to know which is faster – the LEFT JOIN or INNER JOIN. Well, in general INNER JOIN will be faster because it only returns the rows matched in all joined tables based on the joined column. But LEFT JOIN will return all rows from a table specified LEFT and all matching rows from a table specified RIGHT.

What is left inner join in SQL?

There are six types of SQL Joins, and they are: Inner Join: Also called as Join. It returns the rows present in both the Left table, and right table only if there is a match. Full Outer Join: Also called as Full Join. It returns all the rows present in both the Left table, and right table. Left Outer join: Or simply called as Left Join.