Help with the view.

Question

Hi, I have two tables:
Table one with header info including 3 users names (user 1, user 2, user 3)
table two is a user info table with user email (user name, email address , and more).
I would like to create a view with two columns
Column 1     Record ID from the first table
Column 2     Concatenated emails for all 3 users for each record.
Any suggestions
Thanks in advance.
Robert

Answer 1

Hi,
That's called String Aggregation , and the following page shows several ways to do it:
http://www.oracle-base.com/articles/10g/StringAggregationTechniques.php
Which way should you use? That depends on your version of Oracle, and your exact requirements (e.g., whether or not order is important).
Since there are only 3 strings, you could also outer-join to 3 copies of the user_info table.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using.
Edited by: Frank Kulash on Sep 6, 2011 2:39 PM