Sql query to combine multiple rows

Question

I have a table as follows

|Cutomers|Orders|Items| |Cutomer1|Order1|Item1| |Cutomer1|Order1|Item2| |Cutomer1|Order1|Item3| |Cutomer1|Order2|Item1| |Cutomer1|Order2|Item3| |Cutomer1|Order2|Item4| |Cutomer2|Order1|Item6| | . | . | . | | . | . | . | | . | . | . |

I want to have the following table, seems like easy but i have no clue how to deal with it.

|Customers|Items| |Customer1|Item1| |Customer1|Item2| |Customer1|Item3| |Customer1|Item4| |Customer2|Item6| | . | . | | . | . | | . | . |

Any suggestions are very much appreciated!

Answer 1

I think this would suffice

select  distinct Customers, Items
from    YourTable

Answer 2

From Oracle 11gR2, the LISTAGG clause should do the trick:

SELECT customers,
       LISTAGG(items, ',') WITHIN GROUP (ORDER BY items)
FROM YOUR_TABLE
GROUP BY customers;

try this, it might work

you can also wm_concat

SELECT customers, wm_concat(items) as item
FROM   table
GROUP BY customers;

it might also work

for my sql,

select  distinct customers, items from tablename