Union SQL

Sql union

-- UNION: distinct values (slower)
SELECT emp_name AS name from employees
UNION       
SELECT cust_name AS name from customers;

-- UNION ALL: keeps duplicates (faster)
SELECT emp_name AS name from employees
UNION ALL      
SELECT cust_name AS name from customers;

Union SQL

SQL> SELECT  ID, NAME, AMOUNT, DATE
   FROM CUSTOMERS
   LEFT JOIN ORDERS
   ON CUSTOMERS.ID = ORDERS.CUSTOMER_ID
UNION
   SELECT  ID, NAME, AMOUNT, DATE
   FROM CUSTOMERS
   RIGHT JOIN ORDERS
   ON CUSTOMERS.ID = ORDERS.CUSTOMER_ID;

Source: tutorialspoint.com

What is union in sql

UNION:
COMBINES THE RESULT OF 2 QUERY AND
REMOVES DUPLICATE ROWS AND
SORTS BY FIRST COLUMN

-2

Similar codes

3 votes364 views3 answers
Remove all spaces from string sql
SQL
3 votes373 views1 answer
Créer une table sql
SQL
57 votes562 views6 answers
Sql alter table
SQL
2 votes380 views3 answers
Postgres create view
SQL
0 vote367 views1 answer
Create bdd mysql
SQL
0 vote364 views1 answer
How to reset table in sql server
SQL
0 vote387 views1 answer
Sql delete caracter list
SQL
4 votes370 views6 answers
Second max salary in sql
SQL
3 votes384 views1 answer
Kill mysql processlist in whose time more than 200
SQL
0 vote367 views1 answer
OFFSET consulta mysql
SQL