Question

我有一个查询返回，例如，此结果

ID   Name      Year  Age
0    NULL      2013  23
1    Luis      NULL  24
2    Jose      2010  NULL
3    Fernando  2003  43

我想获取所有行，如果对于某些列（在本例中为Name，Year，Age），至少一行具有空值，否则为0行。例如，在公开示例中，我得到4行，因为每列至少有一个空值。

另一方面：

ID   Name      Year  Age
0    NULL      2013  23
1    Luis      NULL  24
2    Jose      2010  34 
3    Fernando  2003  43

年龄没有空值，所以我得到0行。

提前致谢！

Answer 1

使用此：

  with cte as (
    select case when count(*)=count(year) or count(*) = count(name) or count(*)=count(age) then 0 else 1 end as val from data
    )
    select data.* from data,cte where 1 = cte.val

Answer 2

@mrida的版本是完美的，但我使用CTE只计算计数以便更容易支持。

/* test tables:
create table t1 (ID int,Name varchar(100),[Year] int, Age int)

insert t1
select 0,NULL,2013,23 union all
select 1,'Luis',NULL,24 union all
select 2,'Jose',2010,NULL union all
select 3,'Fernando',2003,43

create table t2 (ID int,Name varchar(100),[Year] int, Age int)

insert t2
select 0,NULL,2013,23 union all
select 1,'Luis',NULL,24 union all
select 2,'Jose',2010,34 union all
select 3,'Fernando',2003,43
*/

--for Jose with undefined age
with cte as (select count(*) as AllCount,count(year) as YearsCount,count(name) as NamesCount,count(age) as AgesCount from t1)
select t1.* from t1,cte
where not (cte.AllCount=cte.YearsCount or cte.AllCount=cte.NamesCount or cte.AllCount=cte.AgesCount)

--for 34-aged Jose :)
with cte as (select count(*) as AllCount,count(year) as YearsCount,count(name) as NamesCount,count(age) as AgesCount from t2)
select t2.* from t2,cte
where not (cte.AllCount=cte.YearsCount or cte.AllCount=cte.NamesCount or cte.AllCount=cte.AgesCount)

获取所有列中具有空值的行

2 个答案: