MySQL：如何优化字段 SUM 的结果？

Question

I have this query:

SELECT name, SUM(count_1 + count_2 + count_3 + count_4 + count_5 + count_6) AS Total
FROM my_table

Is there a way to add these values count_1 + count_2 + count_3 + count_4 + count_5 + count_6 and so on.. more efficiently? MySQL keeps crashing for me when I add huge numbers of fields.

Answer 1

Regardless of whether the db design is right or wrong if you use an aggregation function you should use group by

SELECT name, SUM(count_1 + count_2 + count_3 + count_4 + count_5 + count_6) AS Total
FROM my_table
GROUP BY name