joing the rows into together using mysql

Question

I want to join multiple row values from table.

Table name:Item

    ID |            item_id |     Value
    1               43          item1
    2               44          item2
    3               44          item3
    4               44          item4
    5               45          item5
    6               45          item6

ID's are unique (primary key) What I am looking to output is a mysql query is something to which gives this output as given below

Output:

  ID |            item_id |     Value
    1               43          item1
    2               44          item2,item3,item4
    3               44          item2,item3,item4
    4               44          item2,item3,item4
    5               45          item5,item6
    6               45          item5,item6

kindly requesting to give some suggestions

Possible duplicate of [How to use GROUP BY to concatenate strings in MySQL?](http://stackoverflow.com/questions/149772/how-to-use-group-by-to-concatenate-strings-in-mysql) — trincot, Feb 25 '16 at 05:20

score 2 · Answer 1 · answered Feb 25 '16 at 05:18

2

Try this query:

SELECT t1.ID, t1.item_id, t2.Value
FROM item t1
INNER JOIN
(
    SELECT item_id, GROUP_CONCAT(Value) AS Value
    FROM item
    GROUP BY item_id
) t2
    ON t1.item_id = t2.item_id

Follow the link below for a running demo:

SQLFiddle

answered Feb 25 '16 at 05:18

Tim Biegeleisen

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score 0 · Accepted Answer · answered Feb 25 '16 at 05:18

You can use self join with subquery of group_concat

SELECT    i.ID, i.item_id, subquery.`new_value` as value
FROM item i 
JOIN (
    SELECT item_id, GROUP_CONCAT(`Value`) as new_value
    FROM item 
    GROUP BY item_id;
)as subquery 
ON  subquery.item_id = i.item_id;

score 0 · Answer 3 · answered Feb 25 '16 at 05:18

0

You can use below query.

SELECT GROUP_CONCAT(value) FROM Item GROUP BY item_id;

answered Feb 25 '16 at 05:18

RJParikh

4,096
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score 0 · Answer 4 · edited Feb 25 '16 at 06:32

0

Try this Query

  SELECT t1.ID, t1.item_id,
      (
        SELECT GROUP_CONCAT(t2.Value) FROM item AS t2
        WHERE t1.item_id = t2.item_id
        GROUP BY t2.item_id
      ) AS Value
 FROM item AS t1

Demo http://sqlfiddle.com/#!9/bbc20/18/0

edited Feb 25 '16 at 06:32

Ankit Agrawal

2,426
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answered Feb 25 '16 at 06:18

Ninju

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joing the rows into together using mysql

4 Answers4