What is the difference between joins in SQL?
Different Types of SQL JOINs (INNER) JOIN : Returns records that have matching values in both tables. LEFT (OUTER) JOIN : Returns all records from the left table, and the matched records from the right table. RIGHT (OUTER) JOIN : Returns all records from the right table, and the matched records from the left table.
What is the difference between join and left join?
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.
What does (+) mean in SQL joins?
outer join
In Oracle, the (+) specifies that the join is an outer join (instead of an inner join as this implicit join syntax usually implies). Making it an outer join means that the row should be included in the results even if that particular item is null.
What’s the difference between left join and right join in SQL?
The main difference between these joins is the inclusion of non-matched rows. The LEFT JOIN includes all records from the left side and matched rows from the right table, whereas RIGHT JOIN returns all rows from the right side and unmatched rows from the left table.
Is join and inner join same in SQL?
INNER JOIN TABLE2 SQL Inner Join clause is the same as Join clause and works the same way if we don’t specify the type (INNER) while using the Join clause. In short, Inner Join is the default keyword for Join and both can be used interchangeably.
When use left join and right join?
LEFT JOIN vs. RIGHT JOIN
| LEFT JOIN | RIGHT JOIN |
|---|---|
| It joins two or more tables, returns all records from the left table, and matching rows from the right-hand table. | It is used to join two or more tables, returns all records from the right table, and matching rows from the left-hand table. |
Why we use right join in SQL?
The RIGHT OUTER JOIN is used when you want to join records from tables, and you want to return all the rows from one table and show the other tables columns if there is a match else return NULL values.
How many joins in SQL?
ANSI-standard SQL specifies five types of JOIN : INNER , LEFT OUTER , RIGHT OUTER , FULL OUTER and CROSS .