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SQL查询仅在所有必要列都存在且不为NULL时返回数据

SQL查询仅在所有必要列都存在且不为NULL时返回数据

您可以使用exists。我认为您打算:

select t.*
from t
where exists (select 1
              from t t2
              where t2.id = t.id and t2.type = 'Purchase' and t2.total is not null
             ) and
      exists (select 1
              from t t2
              where t2.id = t.id and t2.type = 'Exchange' and t2.total is not null
             ) and
      exists (select 1
              from t t2
              where t2.id = t.id and t2.type = 'Return' and t2.total is not null
             );

有一些方法可以“简化”此操作:

select t.*
from t
where 3 = (select count(distinct t2.type)
           from t t2
           where t2.id = t.id and
                 t2.type in ('Purchase', 'Exchange', 'Return') and
                 t2.total is not null
          );
SQLServer 2022/1/1 18:49:24 有428人围观

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