find the cumulative sum of the previous columns

Hello

How can I get the cumulative sum of a particular column in the preceding lines in the current line.
e.g. I have a table produced,

Date | Orders
__________________
1 JANUARY 10 | 3
JANUARY 2, 10. 5
JANUARY 3, 10. 1

I want to select the date and orders between the 1st and the 3rd. Something like...
Select the Date, the orders for products where Date between to_date('1-JAN-10') and to_date('3-JAN-10')

But I want the output like this...

Date | Orders
__________________
1 JANUARY 10 | 0
JANUARY 2, 10. 3
JANUARY 3, 10. 8

Similarly, when I select it between 2 and 3, I want the output voltage...

Date | Orders
_________________
JANUARY 2, 10. 3
JANUARY 3, 10. 8

and so on. In the output, orders here are the cumulative sum of the previous columns.

Published by: eric clapton, November 8, 2010 20:45

Hello

Use the analytical SUM function.
You want to filter by date after the cumulative SUM is calculated, so calculate the SUM in a subquery, then filter by date no later than:

WITH     got_cm_orders     AS
(
     SELECT     dt
     ,     orders
     ,     SUM (orders) OVER (ORDER BY dt) - orders
               AS cm_orders
     FROM     products
)
SELECT     dt
,     orders
WHERE     dt     BETWEEN     DATE '2010-01-02'
          AND     DATE '2010-01-03'
;

Tags: Database

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Query to find the previous activity in STM
I have a data base to reflect a State of Transition (STM) Machine. It contains 3 tables: activity, node, and Transition.

Tables of knots and Transition are the configuration of the STM. They define the different possible States and the possible transitions between States.

The way that I take through the STM is recorded in the activity Table. A record is created for each visited node.

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For all data below, find the previous activity of activity with id = 4. The correct answer is "C".
```
DROP TABLE Transition;
DROP TABLE Activity;
DROP TABLE Node;

CREATE TABLE Node
(
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);

CREATE TABLE Activity
(
     Id Number(8,0) PRIMARY KEY,
     Node_Id VARCHAR2(1)
);

CREATE TABLE Transition
(
     FromNode_Id VARCHAR2(1),
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);

ALTER TABLE Activity
ADD FOREIGN KEY
(Node_Id) REFERENCES Node(Id);

ALTER TABLE Transition
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ALTER TABLE Transition
ADD FOREIGN KEY
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INSERT INTO Node VALUES ('A');
INSERT INTO Node VALUES ('B');
INSERT INTO Node VALUES ('C');
INSERT INTO Node VALUES ('D');

INSERT INTO Transition VALUES ('A','B');
INSERT INTO Transition VALUES ('B','C');
INSERT INTO Transition VALUES ('B','D');
INSERT INTO Transition VALUES ('C','D');

INSERT INTO Activity VALUES (1,'A');
INSERT INTO Activity VALUES (2,'B');
INSERT INTO Activity VALUES (3,'C');
INSERT INTO Activity VALUES (4,'D');
```
Desired output:
```
ID
-
C
```
Hello

Assuming that all Activity_id tells us nothing on the way, but all lines of activity together to form a single path, we can get results this way:
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(
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     FROM     Transition  t
     JOIN     Activity    a  ON  a.Node_Id  = t.ToNode_Id
     WHERE     LEVEL             = (
                            SELECT  COUNT (*)
                         FROM     activity
                         ) - 1
     START WITH  t.FromNode_Id  = 'A'
     CONNECT BY  t.FromNode_Id  = PRIOR t.ToNode_Id
)
SELECT       REGEXP_SUBSTR ( node_id_path
                 , '([^/]+)/' || (
                                    SELECT  Node_Id
                             FROM    activity
                             WHERE   Id     = 4  -- target_id
                                )
                         || '/'
               , 1
               , 1
               , NULL
               , 1
               )     AS prev_id
FROM       all_paths
;
```
This means, there is some character (I used "/" above) that we know never appears in Activity.Node_Id.

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I'm looking for a function that will help me find the previous quarter, then the format base quarter is YYYY | » Q'|| Q.
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Welcome to the forum!

user13426561 wrote:
Hello
I'm looking for a function that will help me find the previous quarter, then the format base quarter is YYYY | » Q'|| Q.
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Q2 is always long for 92 days. If you subtract 91 days from May 31, you have not changed shifts.
Better use ADD_MONTHS.

but I need help conversion YYYY | » Q'|| Q for a date.

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```
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                           )
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                    )
               , 3 * ( TO_NUMBER (SUBSTR (s, 6, 1))
                  - 2     -- NOTE: subtracting 2, to get previous quarter
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```
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Please help me to get the required sql

I have a table T1 as example below

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Published by: joel_s on August 19, 2011 07:35

Published by: joel_s on August 19, 2011 07:36

Published by: joel_s on August 19, 2011 07:36

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find the cumulative sum of the previous columns

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