comma separated string of selected values in mysql

Question

I want to convert selected values into a comma separated string in MySQL. My initial code is as follows:

SELECT id FROM table_level where parent_id=4;


        

Answer 1

Just so for people doing it in SQL server: use STRING_AGG to get similar results.

Answer 2

Use group_concat() function of mysql.

SELECT GROUP_CONCAT(id) FROM table_level where parent_id=4 GROUP BY parent_id;

It'll give you concatenated string like :

5,6,9,10,12,14,15,17,18,779 

Answer 3

The default separator between values in a group is comma(,). To specify any other separator, use SEPARATOR as shown below.

SELECT GROUP_CONCAT(id SEPARATOR '|')
FROM `table_level`
WHERE `parent_id`=4
GROUP BY `parent_id`;

5|6|9|10|12|14|15|17|18|779

To eliminate the separator, then use SEPARATOR ''

SELECT GROUP_CONCAT(id SEPARATOR '')
FROM `table_level`
WHERE `parent_id`=4
GROUP BY `parent_id`;

Refer for more info GROUP_CONCAT

Answer 4

Check this

SELECT GROUP_CONCAT(id)  FROM table_level where parent_id=4 group by parent_id;

Answer 5

Use group_concat method in mysql

Answer 6

Try this

SELECT CONCAT('"',GROUP_CONCAT(id),'"') FROM table_level 
where parent_id=4 group by parent_id;

Result will be

 "5,6,9,10,12,14,15,17,18,779"