Question

我有如下表格：

create table rrr_br(br_id nvarchar(10), location nvarchar(10))
create table rrr_profile(profileid nvarchar(10), br_id nvarchar(10))
insert into rrr_br values('AAA', 'CHN')
insert into rrr_br values('BBB', 'CHN')
insert into rrr_br values('CCC', 'CHN')
insert into rrr_br values('DDD', 'MDR')
insert into rrr_br values('EEE', 'MDR')
insert into rrr_br values('FFF', 'MDR')
insert into rrr_profile values('111', 'AAA')
insert into rrr_profile values('222', 'BBB')
insert into rrr_profile values('222', 'FFF')

现在我需要从＆＃39; rrr_br＆＃39;表...＆＃34;地点＆＃34;明智的总数和＆＃39; rrr_profile＆＃39;中没有的br_id数量。表

Select  location 'LOCATION', 
    cnt 'Total Vehicles', 
    cnt 'Vehicles Not Processed'
from    (select location,Count(*) cnt  
from    rrr_br  vh(nolock)      
group by location ) B

感谢。

预期结果如下：

  Location| Total Vehicles| Vehicles Not Processed|
  -------------------------------------------------
 CHN    |   3   |   1       |
 MDR    |   3   |   2       |

Answer 1

使用LEFT JOIN确定车辆是否已处理，COUNT(*)包含所有行，COUNT(col)排除空值。

SELECT rrr_br.location, 
    COUNT(*) AS Total, 
    COUNT(*) - COUNT(rrr_profile.profileid) AS NotProcessed
FROM rrr_br
LEFT JOIN rrr_profile ON rrr_br.br_id = rrr_profile.br_id
GROUP BY rrr_br.location

SQL＆＃39;总计数＆＃39;和行数不在另一个表GroupBY中

1 个答案: