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When to use inner join or outer join?


Asked by Briggs Floyd on Dec 06, 2021 FAQ



Inner join basically results in when there is atleast one field common in two or more tables which we want to relate. On the other hand, if there is no any field common in two tables to relate, then we use outer join to relate two tables.
Accordingly,
An Inner Join is a condition that results in the rows which satisfy the ‘where’ clause in “all the tables”; whereas an Outer Join is a condition that results in those rows which satisfy the ‘where’ clause in “at least one of the tables”. On implementing the joins, the temporary tables are created,...
Indeed, The major difference between the two types of join is that Natural join leaves out of the entire tuples in which the value of common attribute (i.e. attribute common to the relations being joined) is not same. Whereas Outer join incorporates such tuples in the resulting relation by using NULL values.
In fact,
If you aren't sure what join type you want to use to combine data from multiple tables, you should use relationships. When you use an inner join to combine tables, the result is a table that contains values that have matches in both tables.
Consequently,
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