"union in sql" Code Answer's
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-- 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;
sql server union all example
SELECT expression1, expression2, ... expression_n FROM tables [WHERE conditions] UNION ALL SELECT expression1, expression2, ... expression_n FROM tables [WHERE conditions];
Combines the results from 2 or more SELECT statements and returns only distinct values. Example: Returns the cities from the events and subscribers tables. SELECT city FROM events UNION SELECT city from subscribers;
union in sql
UNION: COMBINES THE RESULT OF 2 QUERY AND REMOVES DUPLICATE ROWS AND SORTS BY FIRST COLUMN
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