Question

I have the following two tables with data like so:

Table Values
 var_label
 1
 2
 2
 1
 3

Table Codes
var_code
1
2
4
2

I need to join these tables and get the distinct result. The var_label and var_code are equal pieces of data. I want to have the joined output like so:

 MyColumn
1
2
3
4

Wht’s the best way to do this?

Answer 1

Use UNION without ALL(implicit distinct) like so:

SELECT var_label AS MyColumn
FROM Values
UNION
SELECT var_code
FROM Codes

Live Demo