sql查询结果合并

• 使用group_concat合并多行查询结果为一行
  
  
  
  
  

  select
  gs.id id,gs.gs_no gs_no,gs.apply_date apply_date,gs.create_by create_by,group_concat(gd.name) name,gs.apply_description apply_description,gd.unit_name unit_name,gs.apply_status apply_status,gs.apply_by apply_by
  from goods_scrap gs
  left join goods_scrap_items gsi on gs.gs_no = gsi.gs_no
  left join goods gd on gd.gds_id = gsi.gds_id
  WHERE gs.id=64
  GROUP BY gs.id

  
  
  
   
• 使用concat合并多列查询结果为一列
  
  
  
   

  select gd.sgc_name gtype,concat(gd.spec,gd.`name`) gname 
  from goods gd
  WHERE gd.unit_name = (
  	select sd.dict_value
  	from sys_dict_data sd
  	where sd.dict_type="goods_unit" and sd.dict_label="信息科"
  )