Question

I’m a noob at SQL things and I’m looking to do something here. I’ve search around and haven’t found a way to do it, perhaps because I don’t know how to explain it and therefore maybe I’m not searching correctly.

Here’s the problem:
I have a Table with 3 columns that serves as an auxiliary set of properties for a different Table (but that’s kinda irrelevant to the problem).

What I have:

--------------------------------------------
 listing_id  |  field_id  |  listing_value
--------------------------------------------
    1             Fruit        Apple
    1             Color        Red
    2             Fruit        Banana
    2             Color        Yellow
    3             Fruit        Grape
    3             Color        Purple

What I want to get:

----------------------------------------------------
 listing_id  |  listing_value_1  |  listing_value_2 
----------------------------------------------------
    1             Apple               Red
    2             Banana              Yellow
    3             Grape               Purple

Keep in mind this is all happening at the same table.
This is all for selecting values, so the query must start with SELECT

I’ve tried the JOIN, GROUP and UNION commands but I haven’t gotten any successful results.

Also, I’m trying to get this to work via phpMyAdmin which lacks a few commands (for example I can’t use INTERSECT, I can use Select * FROM x but can’t seem to useSELECT x.*)

thanks in advance 🙂

Answer 1

Try this

SELECT t1.listing_id , t1.listing_value as listing_value1 , t2.listing_value as listing_value2
  FROM table t1, table t2 where t1.listing_id = t2.listing_id AND t1.field_id = "Fruit" AND t2.field_id = "Color"