SQL查询大数据库中的大数据过滤器

Question

I have a large database on server. The database is all about the mobile numbers with about 20 millions of records at present. I want to match the mobile numbers on my website to filter the DND or Non-DND mobile numbers. I am using this query for small number filtering

SELECT phone_number
FROM mobnum_table
WHERE phone_number IN ('7710450282', '76100003451', '8910003402', '9410009850', '7610000191');

But what about in the condition I want to filter 1,00,000 mobile number records in few seconds..? I heard about SQL query optimization but not aware so much about it. Also please guide me what storage engine should I consider in this situation?

I have already googled it, but didn't find so much good answer for the same.

Thanks in Advance..

Answer 1

I think there is some problem in your requirement itself. If you tell us more about your problem, may be we can help you. Anyway its not a good idea to give all the 100000 numbers in IN . One option is to create another table and do an inner join.

Assume you have another table selectednumbers with columns id and phone_number , you can do an inner join as follows

SELECT phone_number FROM mobnum_table a inner join selectednumbers b on 
a.phone_number=b.phone_number

As I mentioned earlier, your question is not complete. So kindly provide some more information so we can give optimized query.

Answer 2

So you're generating a list of 100,000 numbers, and then putting that back into another query?

If you're getting the numbers from a table, take the query that generated the list of numbers in the first place, put it inside the in() brackets, and you'll see a large improvement immediately.

Restructure them both to use a JOIN, instead of in() and you'll see even more.

OR, depending on your DB structure, just do

SELECT phone_number
FROM mobnum_table
WHERE DND = 1