Issue with multiple rows combining into single row

Question

I have two tables that look like this:

Table_X
id, cert_number, other random info

Table_Y
id, cert_number, type, name

The issue arises because I have different types in table y that all apply to a single result I want to return (ie: owner name, carrier name, destination name) that are based on the type.

Is there a way that I can combine those into a single result with owner_name, carrier_name, and destination_name?

I used CASE to correctly get the information into the result, but since I use the type field in the select statement, I get back 3 results for each cert_number.

Thanks in advance!

EDIT:

Here is some sample data. The actual SQL statement is incredibly long due to the large amount of parameters I am required to pass along and check for.

table_x
 id  |  cert_number
 1       123-XYZ
 2       124-zyx

table_y
 id  |  cert_number |     type      |  name  
 1       123-XYZ      owner            bob
 2       123-XYZ      destination      paul
 3       124-zyx      owner            steve
 4       123-xyz      carrier          george
 5       124-zyx      carrier          mike
 6       124-zyx      destination      dan

Answer 1

You can use an aggregate function with a CASE expression:

select x.cert_number,
  max(case when y.[type] = 'owner' then y.name end) owner_name,
  max(case when y.[type] = 'carrier' then y.name end) carrier_name,
  max(case when y.[type] = 'destination' then y.name end) destination_name
from table_x x
inner join table_y y
  on x.cert_number = y.cert_number
group by x.cert_number;

See SQL Fiddle with Demo

Or you can join on your table with the type multiple times:

select x.cert_number,
  y1.name as owner_name,
  y2.name as carrier_name,
  y3.name as destination_name
from table_x x
left join table_y y1
  on x.cert_number = y1.cert_number
  and y1.type = 'owner'
left join table_y y2
  on x.cert_number = y2.cert_number
  and y2.type = 'carrier'
left join table_y y3
  on x.cert_number = y3.cert_number
  and y3.type = 'destination';

See SQL Fiddle with Demo