Question

CREATE TABLE "DBA"."TIME_SPENT_DATA" (
  "id" BIGINT NOT NULL,
  "manual_number" INTEGER NULL,
  "user_id" INTEGER NULL,
  "session_id" VARCHAR(100) NULL,
  "total_time_on_site" VARCHAR(100) NULL,
  "date_t" DATE NULL,
  PRIMARY KEY ( "id" ASC )
) IN "system";

id,manual_number,user_id,session_id,total_time_on_site,date_t
3,38001,1357,'123','**3h27m42s**','2014-10-02'
4,38001,1357,'123','**2h20m42s**','2014-10-02'

我想这样做：

select manual_number,user_id,session_id, sum(total_time_on_site)  
FROM "DBA"."TIME_SPENT_DATA" group by manual_number,user_id,session_id

我知道我不能这样做，因为total_time_on_site是一个varchar。但是我怎样才能做到这一点？我想添加这些值（如果我有25小时 - 我需要显示1d 1h）

我可以这样做吗？谢谢

Answer 1

即使您在服务器外部进行转换可能会更好，但我无法抵制摆弄您的数据，如果您想在数据库中进行转换，则应该灵活使用子字符串，charindex和强制转换。工作。不是100％它没有错误，但它确实适用于您相当有限的测试数据。

Sample SQL Fiddle

SELECT 
    manual_number, user_id, session_id,
    CAST(DATEADD(second,SUM(
       CAST(SUBSTRING(total_time_on_site, PATINDEX('%[0-60]%', total_time_on_site), CHARINDEX('h',total_time_on_site)-CHARINDEX('*',total_time_on_site,2)-1) AS INT)*60*60+
       CAST(SUBSTRING(total_time_on_site, CHARINDEX('h',total_time_on_site,0)+1, CHARINDEX('m',total_time_on_site)-CHARINDEX('h',total_time_on_site,0)-1) AS INT)*60+
       CAST(SUBSTRING(total_time_on_site, CHARINDEX('m',total_time_on_site,0)+1, CHARINDEX('s',total_time_on_site)-CHARINDEX('m',total_time_on_site,0)-1) AS INT) 
       ),0)
    AS TIME) AS sum_of_total_time_on_site_as_time
FROM TIME_SPENT_DATA 
GROUP BY manual_number, user_id, session_id

输出：

manual_number user_id     session_id sum_of_total_time_on_site_as_time
------------- ----------- ---------- ---------------------------------
38001         1357        123        05:48:24.0000000

执行求和 - 在Sybase中通过表示句点的列进行分组

1 个答案: