MySQL选择具有相同值的行并输出到HTML CSS /表

Question

I would really appreciate your help on this:

Item_ID Buy_User    Buy_Date    Buy_Qty 
00001       Adam        01/02/2013  1
00003       John        01/01/2013  2
00004       Peter       02/01/2013  1
00001       Nial        01/01/2013  1

Above is an example of my table. What I need is to sql query the Item_ID column, and display each Item_ID only once - but display each of the user's who have bought that product.

I need the query to be outputted in HTML/css.

For example my html page may look like:

Item 1: Adam bought 1. Nial bought 1.

Item 2: (would be hidden as no purchases).

Item 3: John bought 2.

Item 4: Peter bought 1.

I'm not quite sure how to achieve this, I've been googling around and found multiple mentions of sub selects, but i'm not sure how i'd get it to display each row?

Help?!

Many thanks.

Answer 1

Is this what you're looking for? It uses GROUP_CONCAT to group the rows and CONCAT to build the strings:

SELECT Item_Id, GROUP_CONCAT(CONCAT(Buy_User,' bought ',Buy_Qty) SEPARATOR ', ') ITEMS
FROM Items
GROUP BY Item_Id

Here is the SQL Fiddle .

And here are the results:

ITEM_ID   ITEMS
00001     Adam bought 1, Nial bought 1
00003     John bought 2
00004     Peter bought 1