SQL 聚合函数 笔记

select ht_MaiF2,sum(ht_HTmoney) as '总金额' from tb_ht where ht_ISemergency='否' group by ht_maif2

select ht_MaiF2,(sum(ht_HTmoney)-sum(cast(ht_fk as decimal(18,2)))) as '未付款金额',
  count(ht_id) as '合同数',sum(ht_htmoney) as '总金额',
  sum(cast(ht_fk as decimal(18,2))) as '应付款',
  sum(cast(ht_sk as decimal(18,2))) as '已开票',
  (sum(ht_HTmoney)-sum(cast(ht_sk as decimal(18,2)))) as '未开票'
  from tb_ht
  where ht_ISemergency='否' 
  group by ht_maif2
  having sum(ht_HTmoney)!=sum(cast(ht_fk as decimal(18,2)))
 
过滤条件应该用having 字据跟在group by 后面