Query below finds all tables that have 'username' column.
select t.table_schema, t.table_name from information_schema.tables t inner join information_schema.columns c on c.table_name = t.table_name and c.table_schema = t.table_schema where c.column_name = 'username' and t.table_schema not in ('information_schema', 'pg_catalog') and t.table_type = 'BASE TABLE' order by t.table_schema;
- table_schema - name of schema of found table
- table_name - name of found table
- One row represents a table
- Scope of rows: all found tables
- Ordered by table schema
List of tables that have 'username' column.