SQL getting started Tutorial: SQL RIGHT JOIN

Source: Internet
Author: User

SQL getting started Tutorial: SQL RIGHT JOIN

SQL RIGHT JOIN keyword
The right join keyword returns all rows from the right table (table_name2), even if there is no match in the left table (table_name1 ).

SQL syntax

SELECT column_name(s)FROM table_name1RIGHT JOIN table_name2 ON table_name1.column_name=table_name2.column_name
A: Some database connection permissions are called right external connections.

Correct SQL statement addition example
In the "person" table:

P_Id LastName FirstName Address City
1 Hansen Ola Timoteivn 10 Sandnes
2 Svendson Tove Borgvn 23 Sandnes
3 Pettersen Kari Storgt 20 Stavanger

The "Orders" table:

O_Id OrderNo P_Id
1 77895 3
2 44678 3
3 22456 1
4 24562 1
5 34764 15

 

Now, we want to list all the commands and carriers-if any, from the above table.

We use the following SELECT statement:

SELECT Persons.LastName, Persons.FirstName, Orders.OrderNoFROM PersonsRIGHT JOIN OrdersON Persons.P_Id=Orders.P_IdORDER BY Persons.LastName

LastName FirstName OrderNo
Hansen Ola 22456
Hansen Ola 24562
Pettersen Kari 77895
Pettersen Kari 44678
    34764

The right join keyword returns all rows from the right table (Order), even if there is no match, the left table (person ).

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