right join sql
#The RIGHT JOIN keyword Return all rows from the right table (table_name2), even if there are no
#matches in the left table (table_name1).
syntax->SELECT column_name(s)
FROM table_name1
RIGHT JOIN table_name2
ON table_name1.column_name=table_name2.column_name
////example////
SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
RIGHT JOIN Orders
ON Persons.P_Id=Orders.P_Id
ORDER BY Persons.LastNameright join
RIGHT JOIN: Matching part from both
table and unmatching part from right table.right outer vs left outer join
LEFT OUTER JOIN:
is used when retrieving data from
multiple tables and will return
left table and any matching right table records.
RIGHT OUTER JOIN:
is used when retrieving data from
multiple tables and will return right
table and any matching left table recordsPerform a right outer join of self and other.
x = sc.parallelize([("a", 1), ("b", 4)])
y = sc.parallelize([("a", 2)])
sorted(y.rightOuterJoin(x).collect())
# [('a', (2, 1)), ('b', (None, 4))]Copyright © 2021 Codeinu
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