Combine in a single line: check the box Case() and Group BY

Hello

I have a little problem and it seems my knowledge and possession is simply not enough good to slove it.

To better understand my question here an example (the actual query is too large):
Data:
NAME, CASE_NO, GO_TAG
Tom 10 GB
Tom 15 GB
Tom 20
30 Tim
Tim 40

My query looks like this:
SELECT NAME,
CASE
WHEN (GO_TAG IS NOT NULL) THEN wm_concat (CASE_NO)
ANOTHER NULL
END WITH_GO_TAG
CASE
When wm_concat (CASE_NO) (GO_TAG IS NULL) THEN
ANOTHER NULL
END WITHOUT_GO_TAG
GROUP BY NAME, GO_TAG;


Now what I get output:
NAME, WITH_GO_TAG, WITHOUT_GO_TAG
Tom, 10, 15', "
Tom, ", '20'
Tom, 10, 15', "
Tom, cm, 30, 40'

Here's my problem: I want a line instead of two lines for "Tom."
It looks like: Tom, 10 ', 15', 20'

Is this possible?

You should know that I coded those SQL things to right directly in this forum to show you my problem... hope you can understand it :-)

Hope someone can help me in this case.

Oh, almost forgot, I (or better: my company) use Oracle Version: 10g

See you soon,.
Phil

Hello

Thank you. It's clearer.

Did you count 5 lines of sample data, or 10?
In SQL * Plus, when you finish an order with one; and then have a /, the / means "repeat the last command. So, when I run

INSERT INTO EXAMPLE VALUES
('Tom', 10, 'go');
/

I get 2 identical rows. I suppose you want only 1.

When you say ' GROUP BY name, go_tag ', the output contains a line for each distinct combination of name and go_tag.
If you want just one row for each distinct value of the name, just say 'GROUP BY name. If we are not group by go_tag, we must be careful that any reference to go_tag in the SELECT clause is like an aggregation function argument, like this:

SELECT     NAME,
           STRAGG (NVL2 (go_tag, case_no, NULL))     AS with_go_tag,
           STRAGG (NVL2 (go_tag, NULL,    case_no))     AS without_go_tag
    FROM   EXAMPLE
GROUP BY   NAME;

NVL2 (a, x, y) is equivalent to
CASES WHERE an IS NOT NULL THEN x ELSE y END to this problem, I found NVL2 easier than CASES to read and understand, but I don't maintain your code, then you should use your way of thinking is the best.

Tags: Database

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