使用左联接加入 table 时如何正确查询分组依据

Question

此查询不断返回错误：

not a GROUP BY expression

有人可以帮我更正我的查询吗？我不擅长拼桌

select distinct(nama), namabapa, data_saranabapa.nokpbapa, namaibu, data_saranaibu.nokpibu
from ((data_semua_murid
      left join data_saranabapa on data_semua_murid.nokpbapa=data_saranabapa.nokpbapa)
      left join data_saranaibu on data_semua_murid.nokpibu=data_saranaibu.nokpibu)
where kodsekolah='WBA0002'
group by namabapa
order by namabapa asc

Answer 1

您必须按查询中select的所有列分组

select distinct(nama), namabapa, data_saranabapa.nokpbapa, namaibu, data_saranaibu.nokpibu
from ((data_semua_murid
      left join data_saranabapa on data_semua_murid.nokpbapa=data_saranabapa.nokpbapa)
      left join data_saranaibu on data_semua_murid.nokpibu=data_saranaibu.nokpibu)
where kodsekolah='WBA0002'
group by nama, namabapa, data_saranabapa.nokpbapa, namaibu, data_saranaibu.nokpibu
order by namabapa asc

使用左联接加入 table 时如何正确查询分组依据

How correct query for group by when joining table using left join

sql

join

group-by