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CREATE TABLE t( id INTEGER NOT NULL PRIMARY KEY ,name VARCHAR(5) NOT NULL ,manager_id INTEGER ); INSERT INTO t(id,name,manager_id) VALUES (1,'mike',5); INSERT INTO t(id,name,manager_id) VALUES (2,'lisa',3); INSERT INTO t(id,name,manager_id) VALUES (3,'tom',NULL); INSERT INTO t(id,name,manager_id) VALUES (4,'andy',3); INSERT INTO t(id,name,manager_id) VALUES (5,'brian',NULL);
select e.id, e.name, m.name from t e left join t m on m.id = e.manager_id order by e.id
id
name
name
1
mike
brian
2
lisa
tom
3
tom
null
4
andy
tom
5
brian
null