On this MSDN page, it shows that these are equivelant;
LEFT OUTER JOIN or LEFT JOIN
My question, in MSSQL is
JOIN
also equivalent to
LEFT JOIN
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.
The LEFT JOIN statement is similar to the JOIN statement. The main difference is that a LEFT JOIN statement includes all rows of the entity or table referenced on the left side of the statement.
The main difference between the Left Join and Right Join lies in the inclusion of non-matched rows. Left outer join includes the unmatched rows from the table which is on the left of the join clause whereas a Right outer join includes the unmatched rows from the table which is on the right of the join clause.
SQL left outer join is also known as SQL left join. Suppose, we want to join two tables: A and B. SQL left outer join returns all rows in the left table (A) and all the matching rows found in the right table (B). It means the result of the SQL left join always contains the rows in the left table.
No.
JOIN
is equivalent to INNER JOIN
.
Check this example.
Since it returned the rows, we can assume it's an INNER JOIN
.
and checking documentation:
INNER
Specifies all matching pairs of rows are returned. Discards unmatched rows from both tables. When no join type is specified, this is the default.
Also, according to this post, the type-part of the JOIN clause is optional:
For instance, the entire type-part of the JOIN clause is optional, in which case the default is INNER if you just specify JOIN.
For instance, the entire type-part of the JOIN clause is optional, in which case the default is INNER if you just specify JOIN.
-Source LEFT JOIN vs. LEFT OUTER JOIN in SQL Server
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