How can we combine two columns in SQL into one column?

In SQL, you can use the CONCAT() function to combine two columns of information into one column. For example, if you have two columns, first_name and last_name, you can use the following query to combine them into one column called full_name:

SELECT CONCAT(first_name, ' ', last_name) AS full_name
FROM your_table;

This will create a new column called full_name in the output, which contains the merged values of first_name and last_name, separated by a space.

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