parent child mysql code example
Example: parent and child link in mysql
table_children
parent child
0 0
1 1
2 2
3 3
4 4
0 1
0 2
0 3
0 4
1 2
1 3
1 4
3 4
table_children
parent child
0 0
1 1
2 2
3 3
4 4
0 1
0 2
0 3
0 4
1 2
1 3
1 4
3 4