distinct field from two similar tables

[Vijoy Varghese]

Hi Friends,

I am kinda stuck with a SQL query, can some one please guide me?

I have two 'similar' tables
a) open_works_table
b) closed_works_table
now, closed_works_table have 2 extra fields compared with
open_works_table all other fields are same(name and type).

The reason for two similar tables is because open works is quite used
and contain only few rows compared to the huge number of closed
works(rarely used).

I want to get the DISTINCT list of all job_types(a field in both
table) from the two tables. How to get it? these two tables are not
related, just similar. I think, I can just pass a query
SELECT DISTINCT(job_type)
FROM {concatenated openworkstable and closedworks table}

But how to join two tables one below the other? or is there is some
other solution?

TIA
Vijoy