Oracle 如何使用pl/sql按周对记录求和？

我在Oracle中查询了一个如下所示的报告：

SELECT TRUNC (created_dt) created_dt
    ,  COUNT ( * ) AllClaims
    ,  SUM(CASE WHEN filmth_cd in ('T', 'C') THEN 1 ELSE 0 END ) CT
    ,  SUM(CASE WHEN filmth_cd = 'W' THEN 1 ELSE 0 END ) Web 
    ,  SUM(CASE WHEN filmth_cd = 'I' THEN 1 ELSE 0 END ) Icon 
FROM claims c
WHERE c.clsts_cd NOT IN ('IN', 'WD')
   AND  TRUNC (created_dt) between 
    to_date('1/1/2006', 'dd/mm/yyyy') AND 
    to_date('1/1/2100', 'dd/mm/yyyy')
GROUP BY TRUNC (created_dt)
ORDER BY TRUNC (created_dt) DESC;

Create_Dt  AllClaims   CT    Web    Icon
1/26/2011  675         356   285    34
1/25/2011  740         322   379    39
...

它返回如下数据：

SELECT TRUNC (created_dt) created_dt
    ,  COUNT ( * ) AllClaims
    ,  SUM(CASE WHEN filmth_cd in ('T', 'C') THEN 1 ELSE 0 END ) CT
    ,  SUM(CASE WHEN filmth_cd = 'W' THEN 1 ELSE 0 END ) Web 
    ,  SUM(CASE WHEN filmth_cd = 'I' THEN 1 ELSE 0 END ) Icon 
FROM claims c
WHERE c.clsts_cd NOT IN ('IN', 'WD')
   AND  TRUNC (created_dt) between 
    to_date('1/1/2006', 'dd/mm/yyyy') AND 
    to_date('1/1/2100', 'dd/mm/yyyy')
GROUP BY TRUNC (created_dt)
ORDER BY TRUNC (created_dt) DESC;

Create_Dt  AllClaims   CT    Web    Icon
1/26/2011  675         356   285    34
1/25/2011  740         322   379    39
...

我需要的是一个结果集，它将所有每日值相加为每周值。我对PL/SQL非常陌生，不知道从哪里开始

SELECT TRUNC (created_dt, 'IW') created_dt
    ,  COUNT ( * ) AllClaims
    ,  SUM(CASE WHEN filmth_cd in ('T', 'C') THEN 1 ELSE 0 END ) CT
    ,  SUM(CASE WHEN filmth_cd = 'W' THEN 1 ELSE 0 END ) Web 
    ,  SUM(CASE WHEN filmth_cd = 'I' THEN 1 ELSE 0 END ) Icon 
FROM claims c
WHERE c.clsts_cd NOT IN ('IN', 'WD')
   AND  TRUNC (created_dt) between 
    to_date('1/1/2006', 'dd/mm/yyyy') AND 
    to_date('1/1/2100', 'dd/mm/yyyy')
GROUP BY TRUNC (created_dt, 'IW')
ORDER BY TRUNC (created_dt, 'IW') DESC;

---

将根据ISO周的第一天聚合数据。

以下是我经常使用的一个简单示例：

SELECT
 TO_CHAR(created_dt,'WW'),
 max(created_dt),
 COUNT(*)
from MY_TABLE
group by
  TO_CHAR(created_dt,'WW');

to_charcreated_dt，'WW'创建组，maxcreated_dt显示一周的最后一天。如果要显示一周的第一天，请使用mincreated_dt