php 中的最佳数据库管理方式

Question

i started learn database mysql im confusing how to manage all tables in one page

i've tried datatables but still not like what i want i dont know the keyword for searching in google

all tables always have "visitor_id"

example:

list visitor_id

visitor_id	visitor_ip	visitor_country
1	192.168.1.122	SG
2	192.168.1.11	UK
3	192.168.1.9	CN
4	192.168.1.89	UK

file list with file_id and visitor_id

file_path is null, and visitor_id have 2 file_path

file_id	visitor_id	file_path
1	1	/hello.img
2	2	/p.img
3	3
4	4	/hii.img
5	2	/hello.img

i save in the stats tables

look in the stats_file, value is 2 because visitor_id 2 is have two file

and if dont have file, stats_file is 0

stats_id	visitor_id	stats_file
1	1	1
2	2	2
3	3	0
4	4	1

so, i want output like

this

visitor_id 3 is hidden because dont have file

Answer 1

thanks everybody,solved using SQL joining related tables

SELECT f.file_id,f.visitor_id,v.visitor_ip,f.file_path,v.visitor_country FROM file AS f LEFT JOIN visitor AS v ON  f.visitor_id=v.visitor_id

from https://www.w3schools.com/sql/sql_join_inner.asp