Question

SELECT DISTINCT ID FROM (SELECT * FROM tbl1 UNION 
SELECT * FROM tbl2 UNION 
SELECT * FROM tbl3 UNION 
SELECT * FROM tbl4 ORDER BY total_hits DESC) AS sumtbl LIMIT 50;

This query works fine and selects unique ID’s ordered by total_hits DESC, the question is how can I return total_hits column too having Id’s unique?

Answer 1

SELECT ID, SUM(total_hits) 
FROM (
    SELECT * FROM tbl1 UNION 
    SELECT * FROM tbl2 UNION 
    SELECT * FROM tbl3 UNION 
    SELECT * FROM tbl4
) AS sumtbl
GROUP BY ID
ORDER BY SUM(total_hits) DESC
LIMIT 50;