Show sum at the bottom of column in mysql

Question

Instead of using the following query to display the sum of a column at the bottom, is there another method than using the Union query

  select amount 
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Answer 1

The other option is to use SUM() and GROUP BY()

See: http://dev.mysql.com/doc/refman/5.0/en/group-by-modifiers.html

SELECT year, SUM(profit) FROM sales GROUP BY year

This gives you yearly profit without a UNION. You can also add conditionals just like in COUNT()