（mysql）子查询返回多行

Question

I'm trying to fetch the total .of "jml_pddk_miskin" in each district("kecamatan") with Ascending order. But I get the error as "subquery returns more than one row".

this is my query:

select 
mkec.id AS id,mkec.nama AS kecamatan,rpb.tahun AS tahun,
ifnull((select sum(rpb.jml_pddk_miskin) 
        from rekap_penduduk_bps rpb 
        join master_kelurahan mkel on mkel.id = rpb.id_kelurahan 
        where 
        mkel.id_kecamatan = mkec.id 
        and rpb.id_kelurahan = mkel.id 
        group by rpb.id ),0) AS total_miskin 
from master_kecamatan mkec 
join rekap_penduduk_bps rpb 
group by mkec.nama 
order by mkec.id

This is the result of above query: result query

I want result like this... result query

Answer 1

Your inner query

select sum(rpb.jml_pddk_miskin) 
from rekap_penduduk_bps rpb 
join master_kelurahan mkel on mkel.id = rpb.id_kelurahan 
where 
mkel.id_kecamatan = mkec.id 
and rpb.id_kelurahan = mkel.id 
group by rpb.id

is obviously returning more than one row (by the group by clause).

Answer 2

try this,

   SELECT mkec.id AS id,mkec.nama AS kecamatan,rpb.tahun AS tahun,IFNULL((SELECT SUM(rpb.jml_pddk_miskin) 
FROM (rekap_penduduk_bps rpb JOIN master_kelurahan mkel ON mkel.id = rpb.id_kelurahan) WHERE 
mkel.id_kecamatan = mkec.id AND rpb.id_kelurahan = mkel.id GROUP BY rpb.id HAVING rpb.id_kelurahan = mkel.id ),0)
 AS total_miskin FROM master_kecamatan mkec JOIN rekap_penduduk_bps rpb ON mkec.id= rpb.id_kelurahan GROUP BY mkec.nama ORDER BY mkec.id