calculate data for the last 30 days according to the date of sys

SELECT DT, ITEMCODE, ITEMNAME, QTY
FROM   TABLE1
In above given the query, how do I calculate the details of the amount of the last 30 days, APR, MAY, and JUNE

As the month during JULY, August, the amount of detail is required for the last 30 days (from sysdate), MAY, JUNE, July

Please suggest.

Yogesh

Published by: user12957777 on July 28, 2010 03:16

Hello

CASE expressions can filter data in specific columns:

SELECT     SUM ( CASE
            WHEN dt >= ADD_MONTHS ( TRUNC (SYSDATE, 'MONTH')
                         , -3
                         )
            AND  dt <  ADD_MONTHS ( TRUNC (SYSDATE, 'MONTH')
                         , -2
                         )
            THEN qty
           END
         )          AS third_month
,     SUM ( CASE
            WHEN dt >= ADD_MONTHS ( TRUNC (SYSDATE, 'MONTH')
                         , -2
                         )
            AND  dt <  ADD_MONTHS ( TRUNC (SYSDATE, 'MONTH')
                         , -1
                         )
            THEN qty
           END
         )          AS second_month
,     SUM ( CASE
            WHEN dt >= ADD_MONTHS ( TRUNC (SYSDATE, 'MONTH')
                         , -1
                         )
            AND  dt <               TRUNC (SYSDATE, 'MONTH')
            THEN qty
           END
         )          AS last_month
,     SUM ( CASE
            WHEN dt >= TRUNC (SYSDATE) - 30
            AND  dt <  TRUNC (SYSDATE)
            THEN qty
           END
         )          AS last_30_days
FROM     table1
;

You can do this with GROUP BY, in addition, if you want to separate for each itemname (for example) lines.

I guess some things, like what do you mean by the last 30 days.

If you wish to post a few 9creation TABLE or INSERT sample data) and the results you want from this data, then I could test this.

Tags: Database

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