How can SQL combine the results of two queries into a union?

To combine the results of two queries, you can use the UNION operator. Here is an example:

SELECT column1, column2
FROM table1
UNION
SELECT column1, column2
FROM table2;

This will return all rows from table1 and table2, removing any duplicate rows. To keep duplicate rows, you can use the UNION ALL operator.

SELECT column1, column2
FROM table1
UNION ALL
SELECT column1, column2
FROM table2;

This way, you can merge the results of two queries.

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