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create table topic (id int, description varchar(255));
create table comment (id int, description varchar(255));
create table author (id int, description varchar(255));
create table new_topic (id int, description varchar(255));
create table new_comment (id int, description varchar(255));
create table new_author (id int, description varchar(255));
insert into new_topic (id, description) values (1, null);
insert into new_topic (id, description) values (2, 'This is topic description');
insert into new_comment (id, description) values (1, null);
insert into new_comment (id, description) values (2, null);
insert into new_author (id, description) values (1, 'This is casual first author.');
insert into new_author (id, description) values (2, 'This is casual second author.');
6 rows affected
select distinct 'new_topic' as table_name
from new_topic where description is null
select distinct 'new_comment' as table_name
from new_comment where description is null
select distinct 'new_author' as table_name
from new_author where description is null
| table_name |
|---|
| new_topic |
| table_name |
|---|
| new_comment |
| table_name |
|---|