I have a number of tables I am trying to combine with joins but as such, the results are returned in a number of rows whereas I would like to have them generated as new columns. 

member\_information Table
=========================

```
MemberID | FirstName | LastName 
---------------------------------
   1     |   John    |  Harris
   2     |   Sarah   |  Thompson
   3     |   Zack    |  Lewis

```

member\_dependent\_information Table
====================================

```
MemberID | FirstName | LastName | Type
---------------------------------------
   1     |   Amy     | Harris   |  1 
   2     |   Bryan   | Thompson |  1
   2     |   Dewey   | Thompson |  2
   2     |   Tom     | Thompson |  2
   3     |   Harry   | Lewis    |  2
   3     |   Minka   | Lewis    |  1

```

MySQL Query:
============

```
SELECT
    t1.FirstName,
    t1.LastName,
    t1.MemberID,
    IF(t2.Type = '1',CONCAT(t2.FirstName,' ',t2.LastName),'') AS Spouse_Name,
    IF(t2.Type = '2',CONCAT(t2.FirstName,' ',t2.LastName),'') AS Child_Name,

FROM
    member_dependent_information t2
INNER JOIN
    member_information t1
USING
    (MemberID)
ORDER BY
    t1.LastName ASC,
    t1.MemberID ASC;

```

Ideal Results
=============

```
MemberID | FirstName | LastName  | Spouse_Name    | Child_Name1   | Child_Name2 
--------------------------------------------------------------------------------
   1     |   John    |  Harris   | Amy Harris     |     NULL       |   NULL    
   2     |   Sarah   |  Thompson | Bryan Thompson | Dewey Thompson | Tom Thompson    
   3     |   Zack    |  Lewis    | Mika Lewis     | Harry Lewis    |   NULL

```

ACTUAL RESULTS
==============

```
MemberID | FirstName | LastName  | Spouse_Name    | Child_Name 
-------------------------------------------------------------------
   1     |   John    |  Harris   | Amy Harris     |    NULL
   2     |   Sarah   |  Thompson | Bryan Thompson |    NULL  
   2     |   Sarah   |  Thompson |      NULL      | Dewey Thompson  
   2     |   Sarah   |  Thompson |      NULL      | Tom Thompson    
   3     |   Zack    |  Lewis    | Mika Lewis     |    NULL      
   3     |   Zack    |  Lewis    |      NULL      | Harry Lewis    

```

While my query returns the "correct" data in multiple rows, it does not combine the result into one single row as needed.

The suggestion for Pivot Tables / Crosstabs has been mentioned below but every reference I am able to find suggests using mathematic calculations or that the number of fields to be returned is known. I will not know this information as a single member COULD have up to 100 dependents (although more like 4-8)

UPDATE #1
=========

I feel I am getting closer to the final solution. I added the function GROUP\_CONCAT to my query which returns ALL firstnames in a single column and ALL last names in a single column but still need to break them out into their own individual columns.

New function is:

```
SELECT
  t1.MemberID,
  t1.FirstName,
  t1.LastName,
  GROUP_CONCAT(t2.FirstName) AS Dep_Firstnames,
  GROUP_CONCAT(t2.LastName) AS Dep_LastNames
FROM
  member_information t1
  LEFT OUTER JOIN member_dependent_information t2
    ON t1.MemberID = t2.MemberID
WHERE
  t1.Status = 1
GROUP BY
  t1.MemberID

```