Question

我需要查询具有以下格式并期望提供结果的单个表。由于ID验证和注册的状态是在同一天，因此应该忽略它，并且应该返回其他ID

表1

ID  Status  Date
123 Validated   2/3/2016
123 Registered  2/3/2016
234 Validated   2/5/2016
234 Registered  2/7/2016
345 Validated   2/6/2016
456 Registered  2/9/2016

结果

ID  Status  Date
234 Registered  2/7/2016
456 Registered  2/9/2016

Answer 1

这是一个使用连接的选项（有一些样本数据用于测试）：

create table #table1 (id int, stat varchar(20), dt date)

insert into #table1 values(123 ,'Validated',   '2/3/2016')
insert into #table1 values(123 ,'Registered',  '2/3/2016')
insert into #table1 values(234 ,'Validated',   '2/5/2016')
insert into #table1 values(234 ,'Registered',  '2/7/2016')
insert into #table1 values(345 ,'Validated',   '2/6/2016')
insert into #table1 values(456 ,'Registered',  '2/9/2016')

Select a.*
from #table1 a
left join #table1 b
on a.id = b.id
    and a.dt = b.dt
    and b.stat <> 'Registered'
where a.stat = 'Registered' and b.stat is null

Answer 2

嗯。一种方法使用窗口函数：

select t.*
from (select t.*, min(status) over (partition by id, date) as mins,
             max(status) over (partition by id, date) as maxs
      from t
     ) t
where mins = maxs;

这将返回每个日期只有一个状态的记录。

Answer 3

另一种方法是通过像<; p>这样的子查询

select t.*
from tbl t
where Status = 'Registered'
and Date not in (
  select date from tbl
  where Status = 'Validated'
)

Answer 4

SELECT * 
FROM table 
WHERE [Status] = 'Registered'
    AND ID NOT IN (SELECT ID FROM table GROUP BY ID, [Date] HAVING COUNT(ID) > 1)

Answer 5

Select r.*
from table1 r
left join table1 v
      on v.id = r.id
     and v.[date] = r.[date]
     and v.stat ='Validated'
where r.stat = 'Registered' 
and v.id is null

与aph +1相同很多

单表的SQL查询

5 个答案: