你好，我正在尝试编写一个返回此报告的 sql 语句:
-------- Supplier's Order Status Report -------- Page:
Supplier Supplier Order Order Receive Number
Code Name No. Date Date of Days STATUS
---------- -------------------- ---------- -------- -------- --------- --------
101 ACE Auto 1000 04/03/15 04/06/15 3.00 Complete
1001 04/03/15 04/05/15 2.00 Complete
1002 04/04/15 04/05/15 1.00 Complete
1003 04/04/15 04/05/15 1.00 Complete
1004 04/03/15 04/06/15 3.00 Complete
1013 04/13/15 Open
********** ******************** ---------
Avg Days 2.00
102 Better Auto Buys 1005 04/04/15 04/04/15 .00 Complete
1006 04/03/15 04/06/15 3.00 Complete
1010 04/13/15 Open
1011 04/13/15 04/13/15 .00 Complete
********** ******************** ---------
Avg Days 1.00
103 Cars R Us 1007 04/05/15 04/07/15 2.00 Complete
1012 04/13/15 Open
********** ******************** ---------
Avg Days 2.00
104 Delta Parts 1008 04/05/15 04/06/15 1.00 Complete
1009 04/03/15 04/05/15 2.00 Complete
********** ******************** ---------
Avg Days 1.50
这是我的:
SET LINESIZE 100
TTITLE CENTER "------SUPPLIER'S ORDER STATUS REPORT------- Page:"
COLUMN SUPPLIER_CODE HEADING "Supplier|Code"
COLUMN SUPPLIER_NAME HEADING "Supplier|Name"
COLUMN ORD_NUM HEADING "Order|No."
COLUMN ORD_DATE HEADING "Order|Date"
COLUMN ORD_RECDATE HEADING "Recieve|Date"
BREAK ON SUPPLIER_CODE ON SUPPLIER_NAME
SELECT S.SUPPLIER_CODE, SUPPLIER_NAME, ORD_NUM, ORD_DATE, ORD_RECDATE, (ORD_RECDATE-ORD_DATE) AS "Number|of Days", DECODE(ORD_RECDATE, NULL, 'OPEN','COMPLETE') AS STATUS
FROM SUPPLIER S, ORD O
WHERE S.SUPPLIER_CODE = O.SUPPLIER_CODE
ORDER BY S.SUPPLIER_CODE;
我的问题是每当我尝试计算平均天数时，在 sqlplus 或 sql developer 中什么都没有发生？ p.s 我知道它不在我遗漏的代码中。
最佳答案
将 AVG(ORD_RECDATE-ORD_DATE) OVER (PARTITION BY s.supplier_code) AS avg_days 添加到您的 SELECT 子句
关于sql - 无法在报告中计算平均天数？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29905020/