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

10 votes218 views6 answers
Between sql
SQL
4 votes214 views2 answers
What is table in sql
SQL
0 vote210 views1 answer
Utiliser sql ligne de commande
SQL
0 vote305 views1 answer
Sqlite woth cmake
SQL
0 vote201 views1 answer
Mysql beautifier terminla
SQL
3 votes208 views3 answers
How to set up an auto incrementing id db browser
SQL
6 votes214 views1 answer
Oracle rank
SQL
2 votes271 views1 answer
Merge two columns in sql oracle
SQL
1 vote201 views1 answer
Add many column to sap iq table
SQL
1 vote199 views1 answer
Sqlalchemy order_by
SQL