Get values of the same column from two tables

Question

I have this table

select id, name from projects;
id |    name     
---+-------------
 1 | TestProject
 2 | testProject
 3 | test
 4 | sdaf
 5 | P0500

and this table (work_packages)

 select * from work_packages;
 id |  name   | started_on | finished_on | person_month | parent_id | project_id
----+---------+------------+-------------+--------------+-----------+------------+---------
  7 | AP00001 | 2015-10-23 | 2015-10-31  |            0 |         1 |          1 |        
  8 | d       | 2015-10-23 | 2015-10-31  |            0 |         7 |          1 |       

I need this table from projects and work_packages

name         
---------------
 P0500
 AP00001
 d

Answer 1

Try:

select name from projects
union
select name from work_packages;

You can filter the result in where condition, eg

select name from projects
where id >= 5
union
select name from work_packages;