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-- drop table bleh; | |
create table bleh (id char(2) Primary Key, | |
parent_id char(2) ); | |
insert into bleh VALUES ('A1', null); | |
insert into bleh VALUES ('A2', 'A1'); | |
insert into bleh VALUES ('A3', 'A2'); | |
insert into bleh VALUES ('A4', 'A3'); | |
insert into bleh VALUES ('B1', null); |