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Editorial Team
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Asked: 2026-06-09T15:44:15+00:00

Possible Duplicate: mysql with comma separated values I have two tables with more lines,

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Possible Duplicate:
mysql with comma separated values

I have two tables with more lines, like this:

1. numberstable
    ---------------------------
    | number_id | number_name |
    ---------------------------
    |    1      |     one     |
    |    2      |     two     |
    |    3      |     three   |
    |    4      |     four    |
                .
                .
                .
    ---------------------------

2. testtable
    -------------------------------
    | test_id | numbers | sthelse |
    -------------------------------
    |    1    | 2.4.5.6 | text1   |
    |    2    | 4.8.7.1 | text2   |
    |    3    | 2.7.8.5 | text3   |
    -------------------------------

First I would like to combine all three “numbers” rows from table “testtable” to get something like this: 1.2.4.5.6.7.8 and then exclude it in next query. This query is “SELECT number_id, number_name FROM numberstable ORDER BY number_name”. After excluding I would like to show just numbers which aren’t in use in “testtable” (9, 10, 11, …).

How to do that?

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1 Answer

  1. Editorial Team

    If you are trying to relate the numberstable to the testable. I would think you would be much better served to add another table that would relate the two to where you had a schema like

    1. numberstable
    ---------------------------
    | number_id | number_name |
    ---------------------------
    |    1      |     one     |
    |    2      |     two     |
    |    3      |     three   |
    |    4      |     four    |
                .
                .
                .
    ---------------------------

2. testtable
    ---------------------
    | test_id | sthelse |
    ---------------------
    |    1    | text1   |
    |    2    | text2   |
    |    3    | text3   |
    --------------------

3. numbersintesttable
    -----------------------
    | test_id | number_id |
    -----------------------
    |    1    | 2         |
    |    1    | 4         |
    |    1    | 5         |
    |    1    | 6         |
    |    2    | 4         |
    |    2    | 8         |
    |    2    | 7         |
    |    2    | 1         |
    -----------------------

    So the new table would be a many-to-many join table that you could use to get all your needed data in a single query by utilizing the type of joins you want (INNER, OUTER, etc.)

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