訪問：如何查找條目總數的查詢

Question

你會如何走的時候......

FirstName|LastName|Description|Sum of Payment Types 
Stone |Striclan|FICA  |-4001.56 
Stone |Striclan|Cost of Lab|20000.78 

到

FirstName|LastName|Total Pay 
Stone |Striclan|15,999.22 

基本上我只是想加起來所有的無論描述如何，查詢中每個名稱的付款總額。你可以通過使用firstname作爲關鍵字或什麼來解決這個問題嗎？任何和所有的幫助，非常感謝。

Answer 1

這是一個基本聚集查詢：

select FirstName, LastName, sum([Sum of Payment Types]) as [Total Pay] 
from YourTable 
group by FirstName, LastName ; 

Answer 2

SELECT firstname,lastname,sum(total_field_name) FROM table ORDER BY firstname,lastname;