issue with GROUP_CONCAT in JOIN query mysql

Question

I have a join query where I left join 2 tables say tab_sectorand tab_sector_subdivisions. I have records in first table which may or may not have corre

Answer 1

group by missed that`s why it is returning one record,

  SELECT tab_sector.sector_id,tab_sector.sector_title,tab_sector.sector_desc,tab_sector.sector_image,GROUP_CONCAT(tab_sector_subdivisions.subdiv_id) 
FROM tab_sector 
LEFT JOIN tab_sector_subdivisions 
ON tab_sector_subdivisions.sector_id = tab_sector.sector_id WHERE tab_sector.active = 'Y'
group by tab_sector.sector_id,tab_sector.sector_title,tab_sector.sector_desc,tab_sector.sector_image;

Answer 2

You need the group by for the not aggregated columns

SELECT tab_sector.sector_id,tab_sector.sector_title,tab_sector.sector_desc
    ,tab_sector.sector_image,group_concat(tab_sector_subdivisions.subdiv_id )
LEFT JOIN tab_sector_subdivisions 
        ON tab_sector_subdivisions.sector_id = tab_sector.sector_id 
              AND tab_sector.active = 'Y'
GROUP BY  tab_sector.sector_id,tab_sector.sector_title,
     tab_sector.sector_desc, tab_sector.sector_image