SQL retrieve first & last name based on ID from other table

Question

Currently I'm stuck with something that I think is easy to do but I'm going to ask it anyway.

I have a table called zg_data which looks like this:

+---------------------+------------------+
|       dataID        |      employee    |
+---------------------+------------------+
|         12          |        123       |
+---------------------+------------------+

and a table called zg_employees which looks like this:

+---------------------+------------------+------------------+
|      employeeID     |    Firstname     |     Lastname     |
+---------------------+------------------+------------------+
|          123        |       Test       |       User       |
+---------------------+------------------+------------------+

Now what I need to do is when selecting data from the zg_data table instead of it returning the employeeID I would like that it returns the Firstname & Lastname instead. I've been reading about joining tables but I haven't been able to figure it out just yet.

Kind regards in advance.

Answer 1

Well, it's basic JOIN operation, you should be able to figure it out on your own if you are familiar with it:

select d.dataID, e.Firstname, e.Lastname
from zg_data d join zg_employee e on d.employee = e.employeeID