oracle11g - Concatenating records when id is the same in Oracle -

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I have an Oracle 11g database.

My table CHATUSERS looks like this: 

  UserId - Identifier SeqNum - Chat conversation order chat text - Added chat text date - DateTime chat conversation occurred.

A user can have multiple chat sessions in one day. I want to combine all per person per chat.

Example: 

  UserId SeqNum added date ChatText --------------- ---------- ------- 1 1 28-October -14 Hey, how are you? 1 2 28-OCT-14 Do you have a minute? 1 3 28-Oct-14 wanted to talk to you about something 1 1 25-Oct-14 Congratulations! 1 2 25-OCT-14 on your promotion

will return the selected query results: 

  UserId, added date and full text 1 28-OCT - Hey, how are you? do you have a minute? Wish to talk to you about something 1 25-Oct-14 Congratulations!

code> UserId, datedaided, LISTAGG (chat text , '') Choose;


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