T-SQL Group with with where子句

Question

 Masterid    CC  CLA DES NLCLA   NLDES
 -------------------------------------
 53006141    CN  0   0   1       1
 53006141    US  1   1   1       1
 53006141    UK  1   1   0       0
 53006142    US  1   1   0       0
 53006142    UK  1   1   0       0
 53006143    CN  0   0   1       1
 53006143    US  1   1   0       0
 53006143    UK  1   1   0       0

从上面的数据我需要生产

• MasterIds哪里有CC = US或CC = CN和NLCLA = 1和的列表NLDES = 1

输出应该是

53006141
53006143

在MasterID下必须有CN和US.

有人可以帮我在SQL中做这个吗？

Answer 1

您可以通过添加一个WHERE子句来执行此操作,该子句将返回带有US或的行CN:

select distinct Masterid
from yourtable
where cc in ('US', 'CN')
  and NLCLA = 1
  AND NLDES = 1

请参阅SQL Fiddle with Demo

如果您希望结果包含CN和US,那么您可以使用:

select Masterid
from yourtable
where cc in ('US', 'CN')
  and NLCLA = 1
  AND NLDES = 1
group by masterid
having count(distinct cc) = 2

请参阅SQL Fiddle with Demo.

另一种方法是使用a EXISTS来获取带有US和的MasterIds列表CN.然后将其他过滤器放在WHERE子句中而不是子查询中.

select distinct masterid
from yourtable t1
where exists (select Masterid
              from yourtable t2
              where cc in ('US', 'CN')
                and t1.masterid = t2.masterid
              group by masterid
              having count(distinct cc) = 2)
  and NLCLA = 1
  and NLDES = 1;

请参阅SQL Fiddle with Demo