Question : Select min value from multiple tables

Lets say I have 4 tables all with different loc_id values(10,15,20,10). How do I select the min value found in all 4 tables.

select min(loc_id)  from table1
select min(loc_id)  from table2
select min(loc_id)  from table3
select min(loc_id)  from table4

Results:
1| 10
--------
1| 15
--------
1| 20
-------
1|10

what I would like is 1 row with the value:10

Answer : Select min value from multiple tables

SELECT MIN(locID) from
(
select min(loc_id) locid  from table1
union
select min(loc_id)  from table2
union
select min(loc_id)  from table3
union
select min(loc_id)  from table4 )A