What is the advantage of outer join?
An outer join returns a set of records (or rows) that include what an inner join would return but also includes other rows for which no corresponding match is found in the other table. There are three types of outer joins: Left Outer Join (or Left Join) Right Outer Join (or Right Join)
What is the difference between left and right outer join?
Full Outer Join returns all the rows from both the table….Differences between Left Outer Join, Right Outer Join, Full Outer Join :
| Left Outer Join | Right Outer Join | Full Outer Join |
|---|---|---|
| Unmatched data of the right table is lost | Unmatched data of the left table is lost | No data is lost |
How to get left join output in SQL?
To get the left join output using SQL, it finds all the rows from the first table including the matching rows from the right table. However, if there is no match in the second table it returns a null value.
Which is an example of LEFT OUTER JOIN in SQL?
Example of SQL LEFT OUTER JOIN. Let’s create the two tables given below to understand the example of left outer join in SQL server. Below are the two tables contain the column with one column matching rows. SQL LEFT OUTER Join Example Using the Select Statement. The first table is Purchaser table and second is the Seller table.
Can a join return the same result as a subquery?
The query below returns the same result by using a JOIN: It becomes a very simple query. It connects the two tables by product ID and selects the names and the costs of these products. It is an INNER JOIN, so if a product doesn’t have its ID in the sale table, it will not be returned.
Which is more efficient, a subquery or a join?
A JOIN is more efficient in most cases, but there are cases in which constructs other than a subquery is not possible. While subqueries may be more readable for beginners, JOIN s are more readable for experienced SQL coders as the queries become more complex.