Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
my MySQL database has over 1 million records and is growing more and more. I have a value ‘aid’ there which is sometimes available multiple times. I want to count aid.
I tried
SELECT COUNT ( DISTINCT (value) ) AS somevalue
FROM table
which worked but now there are so many values that it takes longer than max_exec_time. I also tried the same with GROUP BY without success.
Is there any way to run this query fast? Or are there any other solutions?
Make value a index! Counting a index is much faster then processing records in a table.