IS LEFT JOIN inner or outer?

IS LEFT JOIN inner or outer?

Inner join: Only show rows, when has it data from both of the tables. Outer join: (left/right): Show the all result from the left / right table with the paired row(s), if it exists or not. The simplest way to do this is cross join. Left: it will return all records from left table and matched record from right table.

Which table is left in left join?

SQL – LEFT JOINS. The SQL LEFT JOIN returns all rows from the left table, even if there are no matches in the right table. This means that if the ON clause matches 0 (zero) records in the right table; the join will still return a row in the result, but with NULL in each column from the right table.

What is left outer join example?

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.

How does LEFT JOIN work?

The LEFT JOIN allows you to query data from two or more tables. Similar to the INNER JOIN clause, the LEFT JOIN is an optional clause of the SELECT statement, which appears immediately after the FROM clause. Suppose that you want to join two tables t1 and t2 .

What is left and right outer join in SQL?

DEFINITION. LEFT OUTER JOIN / LEFT JOIN returns all the rows from the LEFT table and the corresponding matching rows from the right table. If right table doesn't have the matching record then for such records right table column will have NULL value in the result.