2 alter table user_group drop column dead1;
3 alter table user_group drop column dead2;
4 alter table user_group drop column dead3;
7 alter table groups drop column dead1;
8 alter table groups drop column dead2;
9 alter table groups drop column dead3;
10 alter table groups drop column dead4;
11 alter table groups drop column dead5;
12 alter table groups drop column dead6;
13 alter table groups drop column dead7;
14 alter table groups drop column dead8;
15 alter table groups drop column dead9;
16 alter table groups drop column dead10;
17 alter table groups drop column dead11;
18 alter table groups drop column dead12;
19 alter table groups drop column dead13;