I have a table which gives unit sales of different items by day. I want to sum the sales for a number of user-defined (effectively arbitrary, no way to specify directly from the data) periods.
I'm trying to do this by creating a field that specifies whether what period date is within, then I can group by this. However my code is giving me the error "ORA-00923: FROM keyword not found where expected".
MY CODE:
select
SUM(UNIT_SALES),
PERIOD =
CASE
WHEN DAY_DATE >= TO_DATE('04/07/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('26/09/2013', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('27/09/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('01/04/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('14/05/2014', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('21/09/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
ELSE 'NO PERIOD ASSIGNED'
END
FROM MY_SALES_DAILY
GROUP BY PERIOD
ORDER BY PERIOD
How can I achieve this sum for user-defined periods?
Your syntax is incorrect. PERIOD =
is incorrect. See the corrected SQL below.
select
SUM(UNIT_SALES),
CASE
WHEN DAY_DATE >= TO_DATE('04/07/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('26/09/2013', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('27/09/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('01/04/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('14/05/2014', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('21/09/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
ELSE 'NO PERIOD ASSIGNED'
END AS PERIOD
FROM DW_MASTER_SALES_DAILY
GROUP BY CASE
WHEN DAY_DATE >= TO_DATE('04/07/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('26/09/2013', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('27/09/2013', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('01/04/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
WHEN DAY_DATE >= TO_DATE('14/05/2014', 'DD/MM/YYYY') AND DAY_DATE <= TO_DATE('21/09/2014', 'DD/MM/YYYY') THEN 'Start of Period of pre_activity'
ELSE 'NO PERIOD ASSIGNED'
END
ORDER BY PERIOD
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