SQL Server 中多个表的多个聚合函数

Question

我正在尝试获取输入人员的数据，我想提取特定人员的发票数量和行项目数量等数据。

输出是

Entered_by  No of line items
CD               9
CD               136084
deepa             7
deepa             18
dolly             757
dolly             22350
kroshni         666
kroshni         16161
lokesh           4
lokesh           999
MHeera           639
MHeera             20427
nandini            7
nandini            5318

这里的行项目数中的数据是“行项目数”计数和“发票数”计数的混合，我想显示类似

Entered_by  No of line items    No of invoices
CD               136084              9
deepa               18                7
dolly               22350               757

请帮我解决这个问题...... 

这是T- SQL查询

select ENTERED_BY, count(entered_by) 'NO OF LINE ITEMS'
from im_invoice, im_invoice_line_item, im_invoice_inventory 
where invoice_rid = invoice_fk
and invoice_inventory_rid = invoice_inv_fk
and enter_date between dateadd(mm, -3, getdate()) and dateadd(mm,0,getdate())
group by entered_by

union 

select entered_by, count(invoice_num) 'NO OF INVOICES' from im_invoice
where enter_date between dateadd(mm, -3, getdate()) and dateadd(mm,0,getdate())
group by entered_by

Answer 1

正如乔所说，如果您给我们更详细的描述，我们可以给您更好的答案，但在那之前，完成此操作的快速而肮脏的方法如下：

1. 摆脱联合
2. 将 2 个查询转换为派生表
3. 从它们中选择连接在 Entered_by 上。

例如。

SELECT LineItems.ENTERED_BY, [NO OF LINE ITEMS], [NO OF INVOICES] 
FROM
(SELECT ENTERED_BY,COUNT(entered_by) 'NO OF LINE ITEMS' 
FROM im_invoice, im_invoice_line_item,im_invoice_inventory   
WHERE invoice_rid = invoice_fk  
AND invoice_inventory_rid = invoice_inv_fk
AND enter_date BETWEEN dateadd(mm, -3, getdate()) AND dateadd(mm,0,getdate())
GROUP BY entered_by) AS LineItems 
INNER JOIN 
(SELECT entered_by, count(invoice_num) 'NO OF INVOICES' 
FROM im_invoice  
WHERE enter_date BETWEEN dateadd(mm, -3, getdate()) AND dateadd(mm,0,getdate())  
GROUP BY entered_by ) AS invoices 
ON invoices.entered_by = LineItems.ENTERED_BY