Question

I created this ipview:

and this tcpview:

as you see the tcpview is smaller because some of cids doesn’t have port so I wanted to combine these two views and when a cid doesn’t have port make it empty in that field which operation should I take here and how?

Answer 1

left join tables and use ifnull to change null values to empty.

select i.cid, i.ip_src, i.ip_dst, ifnull(t.tcp_sport, '') as tcp_sport, ifnull(t.tcp_dport, '') as tcp_dport
from ipview i
left join tcpview t on i.cid = t.cid