SQL

SQL RIGHT JOIN

SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
RIGHT JOIN Orders
ON Customers.customer_id = Orders.customer;

ms sql left join select

SELECT * FROM 
(SELECT [UserID] FROM [User]) a
LEFT JOIN (SELECT [TailUser], [Weight] FROM [Edge] WHERE [HeadUser] = 5043) b
ON a.UserId = b.TailUser

SQL Syntax of LEFT JOIN

SELECT columns
FROM table1
LEFT JOIN table2
ON table1.column_name = table2.column_name;

sql right join

SELECT *
FROM table_1
RIGHT JOIN table_2
ON table_1.common_field = table_2.common_field;

SQL LEFT JOIN

SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
LEFT JOIN Orders
ON Customers.customer_id = Orders.customer;

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.LastName 

ms sql left join select

SELECT * FROM 
(SELECT [column] FROM [table]) a
LEFT JOIN (SELECT [column1], [columnn2] FROM [table]) b
ON a.column = b.column1

left join sql

#LEFT JOIN: Return all rows from the left table, even if there are no matches in the right
#table 
syntax->SELECT column_name(s)
FROM table_name1
LEFT JOIN table_name2
ON table_name1.column_name=table_name2.column_name 
////example/////
SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
LEFT JOIN Orders
ON Persons.P_Id=Orders.P_Id
ORDER BY Persons.LastName 

SQL RIGHT JOIN

SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
RIGHT JOIN Orders
ON Customers.customer_id = Orders.customer;

0

Select..
LEFT JOIN Child c ON c.ParentAId = a.ParentAId 
union
Select..
left Join Child c ON c.ParentBId = b.ParentBId

left join example sql server

SELECT table1.column1, table2.column2...
FROM table1
LEFT JOIN table2
ON table1.common_field = table2.common_field;