MYSQL Group Concat Select Some Selected Rows Only | Use Sort In Group Concat | Sort MySQL Rows in Group Concat

Its so simple. Just need to do below thins:

SELECT SUBSTRING_INDEX(GROUP_CONCAT(x.id ORDER BY x.nx DESC), ',', 2) as row_name from some_table GROUP BY some_field

It will select First two values only.

It total value of GROUP_CONCAT is "1,2,3,4,5" Then Using SUBSTRING_INDEX would be like "1,2"

You can use DISTINCT in GROUP_CONCAT function like SUBSTRING_INDEX(DISTINCT(GROUP_CONCAT(x.id ORDER BY x.nx DESC)), ',', 2)

Laravel group concat operation

It is important to get some concat value. You can use GROUP_CONCAT in Laravel easily. Below is a code snippet to do the trick:

$result = DB::table('table_name')
       ->select(DB::raw('group_concat(field_name) as field_name_alias'))
       ->where('condition_field', '=', $condition_value )
       ->first();

Concatenate/concat/group_concat two columns/rows with MySQL query

Two/more rows concatenate-

You can use GROUP_CONCAT.

As in:

select person_id, group_concat(hobbies separator ', ')
    from peoples_hobbies group by person_id;

Death: As Dag stated in his comment, there is a 1024 byte limit on result. to solve this run this query before your query:

set group_concat_max_len=2048

Off course, you can change 2048 accourding to your needs.

Two/more columns concatenate-

You can use the CONCAT function like this:

SELECT CONCAT(SUBJECT, ' ', YEAR) FROM table