samedi 29 novembre 2014

Why mySql is not responding during group by query?


MySql has default setting and system configuration is I5(2.5GHz 8GB Ram)


Table has 18 mill rows and i trying to run this query



select ID ,count(*)
from table
where TYPE='good'
group by ID ,TYPE
limit 2 ;


would please explain how i can solve this problem





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