sql server - How to get column values in one comma separated value -

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i have table contains rows below

id  user      department 1   user1     admin 2   user1     accounts 3   user2     finance 4   user3     sales 5   user3     finance

i need select query results following format

id  user      department 1   user1     admin,accounts 2   user2     finance 3   user3     sales, finance

you tagged question both sql-server , plsql provide answers both sql server , oracle.

in sql server can use for xml path concatenate multiple rows together:

select distinct t.[user],   stuff((select distinct ', ' + t1.department          yourtable t1          t.[user] = t1.[user]             xml path(''), type             ).value('.', 'nvarchar(max)')          ,1,2,'') department yourtable t;

see sql fiddle demo.

in oracle 11g+ can use listagg:

select "user",   listagg(department, ',') within group (order "user") departments yourtable group "user"

see sql fiddle demo

prior oracle 11g, use wm_concat function:

select "user",   wm_concat(department) departments yourtable group "user"

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