根据where子句向临时表添加其他列

Question

我有三个表，它们之间没有外键。我需要从所有这3个表中获取count(*)。我在这些表之间使用union，并能够获得如下输出。

Output:
10
20
15

但是，我需要在指定表名称或LineOfBusiness的那些行旁边添加其他列。有人可以帮助我实现这一目标。

Expected Output:
10    Customer
20    Provider
15    Merchant

Answer 1

缺少很多信息，因此我将继续使用您提供的信息；简而言之，您要问的是非常简单。您只需要像下面这样在select语句中输入表名即可：

select count(*) as Total, 'RDC' as TableName
from DL_5000_5002 as RDC
where RDC.CallStatusZone1 in ('P')

union all

select count(*) as Total, 'U' as TableName 
from DL_5000_5003 as U 
WHERE U.CallStatusZone1 in ('P') 

union all

select count(*) as Total, 'PM' as TableName
from DL_5005_5005 AS PM 
where PM.CallStatusZone1 in ('P') 

union all

select count(*) as Total, 'PP' as TableName
from DL_5005_5006 AS PP 
where PP.CallStatusZone1 in ('P')

现在，如果您想根据条件将这些表名动态地拉到另一列或其他值中，那将是另一回事了。

结果集如下：

Total       TableName
----------  ----------
1835        RDC
0           U
0           PM
0           PP