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mysqlgroup-concat

Group Concat in MySql

I have a sample table with some records. I show the table structure and the expected output. Please help me to do this. Now i use Group_Concat but its showing 1,1 and 2,2 and 3,3 in ids field.

ID  PRODUCT     QUANTITY
1   COMPUTER    100
2   MOUSE       120
3   KEYBOARD    10
4   MOUSE       150
5   KEYBOARD    300
6   COMPUTER    20
7   KEYBOARD    1

Eexpected Output

ID  PRODUCT QUANTITY    IDS
1   COMPUTER    120     1,6
2   MOUSE       270     2,4
3   KEYBOARD    311     3,5,7
Solution

  • ORDER BY ID(outer) will show you the first id for a product,
    DISTINCT in group_concat compels all ids to be distinct and ORDER BY makes them in order
    try this:

    SELECT
    ID, PRODUCT, SUM(QUANTITY) QUANTITY, GROUP_CONCAT(DISTINCT ID ORDER BY ID) IDS
FROM
    <table>
GROUP BY PRODUCT
ORDER BY ID
;