select PARENT, CHILD, max(DATE_EXECUTION)
from TEST_EXECUTION
group by PARENT, CHILD;
?
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Question
How do I get the required resylt using a single complex query
I have the following table with following data:
CREATE TABLE TEST_EXECUTION
(
PARENT VARCHAR2(10),
CHILD VARCHAR2(10),
DATE_EXECUTION DATE
);
Data:
PARENT CHILD DATE_EXECUTION
---------- ---------- ---------------------
A B 7/22/2008
B C 7/21/2008
B C 7/23/2008
C D 7/21/2008
C D 7/23/2008
D E 7/24/2008
E F 7/24/2008
F G 7/25/2008
G H 7/25/2008
H I 7/25/2008
I J 7/26/2008
J K 7/27/2008
And the Result I am expecting is as follows:
PARENT CHILD DATE_EXECUTION
---------- ---------- ---------------------
A B 7/22/2008
B C 7/23/2008
C D 7/23/2008
D E 7/24/2008
E F 7/24/2008
F G 7/25/2008
G H 7/25/2008
H I 7/25/2008
I J 7/26/2008
J K 7/27/2008
Not being so proficient in high level Database knowledge, I am struggling a bit with this, need help.
If a befitting solution is available in 9i its cool, but even if its 10g, even thats cool.
Thanks
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Answers
ok let me modify the data a bit.
Data:
PARENT CHILD DATE_EXECUTION
---------- ---------- ---------------------
A B 7/22/2008
B C 7/21/2008
B C 7/23/2008
B C 7/24/2008
C D 7/21/2008
C D 7/23/2008
C D 7/24/2008
D E 7/24/2008
E F 7/24/2008
F G 7/25/2008
G H 7/25/2008
H I 7/25/2008
I J 7/26/2008
J K 7/27/2008
Expected Result:
PARENT CHILD DATE_EXECUTION
---------- ---------- ---------------------
A B 7/22/2008
B C 7/23/2008
C D 7/23/2008
D E 7/24/2008
E F 7/24/2008
F G 7/25/2008
G H 7/25/2008
H I 7/25/2008
I J 7/26/2008
J K 7/27/2008
The query given by ishando did work, but it failed in this case.
These are transactions that occur, from time to time.
I want the rowsets containing the first transactions.
and subsequent transactions happening on the day or later.
A, B, C , D etc are the transaction ids.
So I want all the transactions listed, starting from Transactiuon A.
Hence the result expected is.
PARENT CHILD DATE_EXECUTION
---------- ---------- ---------------------
A B 7/22/2008
B C 7/23/2008
C D 7/23/2008
D E 7/24/2008
E F 7/24/2008
F G 7/25/2008
G H 7/25/2008
H I 7/25/2008
I J 7/26/2008
J K 7/27/2008
Where "B C 7/23/2008 " occurs for the first time after "A B 7/22/2008" has been executed.
Thanks
Use this query:
select parent, child, min(date_execution )
from (
select parent, child, date_execution
from (
select parent, child, date_execution , dense_rank() over(order by parent||child) rn
from tbl1)
start with rn = 1
connect by prior rn = rn - 1
and prior date_execution <= date_execution)
group by parent, child
order by parent, child
/
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by: raju1105Posted on 2008-08-12 at 00:47:21ID: 22210784
Try the distinct function.
Eg:
select distinct (PARENT), CHILD, DATE_EXECUTION from TEST_EXECUTION order by 1;