在Sybase表

Question

你如何總結行數據我有此表在Sybase：

Date    File_name File_Size customer Id 
1/1/205 11:00:00 temp.csv 100000  ESPN  1111 
1/1/205 11:10:00 temp.csv 200000  ESPN  1122 
1/1/205 11:20:00 temp.csv 400000  ESPN  1456 
1/1/205 11:30:00 temp.csv 400000  ESPN  2345 
1/2/205 11:00:00 llc.csv  100000  LLC   445 
1/2/205 11:10:00 llc1.txt 200000  LLC   677 
1/2/205 11:20:00 dtt.txt  500000  LLC   76 
1/2/205 11:30:00 jpp.txt  400000  LLC   666 

我需要拿出一個查詢，總結了一天，這個數據，這將是月/日/年。

Date  total_file_size number_of_unique_customers number_unique_id 
1/1/2015 110,000   1       4 
1/2/2015 120,000   1       4 

我該如何做到這一點在SQL查詢？我試過這個：

select convert(varchar,arrived_at,110) as Date 
    sum(File_Size), 
    count(distinct(customer)), 
    count(distinct(id)) 
group by Date 

似乎沒有工作，任何想法？

Answer 1

嘗試

select 
    convert(varchar,arrived_at,110) as Date, 
    SUM(File_Size), 
    count(distinct customer) as number_of_unique_customers, 
    count(distinct id) as number_unique_id 
group by convert(varchar,arrived_at,110)