MySQL query returns duplicate rows

Question

I have a table mytable like below;

╔═════════╦══════╦═════╗
║ product ║ tag  ║ lot ║
╠═════════╬══════╬═════╣
║ 1111    ║ 101  ║ 2   ║ 
║ 1111    ║ 102  ║ 5   ║ 
║ 2222    ║ 103  ║ 6   ║ 
║ 3333    ║ 104  ║ 2   ║  
║ 4444    ║ 101  ║ 2   ║ 
║ 5555    ║ 101  ║ 2   ║ 
║ 5555    ║ 102  ║ 5   ║ 
║ 6666    ║ 102  ║ 2   ║ 
║ 6666    ║ 103  ║ 5   ║
║ 7777    ║ 101  ║ 2   ║ 
║ 7777    ║ 102  ║ 5   ║ 
║ 7777    ║ 103  ║ 6   ║ 
║ 8888    ║ 101  ║ 1   ║ 
║ 8888    ║ 102  ║ 3   ║ 
║ 8888    ║ 103  ║ 5   ║ 
║ 9999    ║ 101  ║ 6   ║ 
║ 9999    ║ 102  ║ 8   ║
╚═════════╩══════╩═════╝

I have the input 101,102. I want the output like;

2,5
6,8

I have a query like;

select group_concat(lot order by lot)
from `mytable`
group by product
having group_concat(tag order by tag) = '101,102';

It returns;

2,5
2,5
6,8

Instead of two 2,5, I want just one, avoiding duplicate rows. How can I do this?

Here is the fiddle http://sqlfiddle.com/#!9/7a78bb/1/0

Answer 1

If you want distinct then

select distinct group_concat(lot order by lot)
from `mytable`
group by product
having group_concat(tag order by tag) = '101,102';