doutou7961 2017-02-21 16:04
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从多行查询创建单行SQL条目并将其发布到新表中

I have a SQL table_1 with the following data:

enter image description here

There are multiple entries with and the same MSISDN gets repeated, but with different servicCodes in each line.

I would like to copy the info into a new table_2, but with only one entry per MSISDN and some extra columns with the services assigned to it. Can this be done with a single SQL query, or is it be best to use PHP to do a distinct query and loop through the results?

Thanks.

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  • dongmeba4877 2017-02-21 16:14
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    With SQL you can create a second table with a column with the servicCodes concatenated. You can use the GROUP BY to aggregate around the MSISDN column.

    SELECT MSISDN, GROUP_CONCAT(servicCodes) as servicCodes_concatenated
    FROM table
    GROUP BY MSISDN
    

    If you want to create multiple columns to have the values of servicCodes it's easier to use PHP.

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