Filter Data based on date Condition

Question

Hi,
Below is the query which is performing cast operation to convert string to date. Now my requirement is to filter all the dates which is from 1/1/2010 or later.
>> SELECT
>> CAST( TICKETID AS VARCHAR2(4000)) TICKETID,
CAST(CUSTOMERID AS VARCHAR2(4000)) CUSTOMERID,
CAST(CUSTOMEREMAIL AS VARCHAR2(4000)) CUSTOMEREMAIL,
CAST(CREATEDBY AS VARCHAR2(4000)) CREATEDBY,
TO_CHAR (TO_DATE ( CAST (DATECREATED AS VARCHAR2 (4000)) , 'Mon DD YYYY HH:MIAM'),'DD-MM-YYYY HH24:MI:SS') DATECREATED
FROM TICKETSI tried with the below format, But it shows as not a valid month to filter please suggest me how to perform the filter on this cast operation of cast conversion.
>> SELECT * FROM
>> ( SELECT
CAST( TICKETID AS VARCHAR2(4000)) TICKETID,
CAST(CUSTOMERID AS VARCHAR2(4000)) CUSTOMERID,
CAST(CUSTOMEREMAIL AS VARCHAR2(4000)) CUSTOMEREMAIL,
CAST(CREATEDBY AS VARCHAR2(4000)) CREATEDBY,
TO_CHAR (TO_DATE ( CAST (DATECREATED AS VARCHAR2 (4000)) , 'Mon DD YYYY HH:MIAM'),'DD-MM-YYYY HH24:MI:SS') DATECREATED
FROM TICKETS )
WHERE
DATECREATED >= TO_DATE('01-01-2010','DD-MM-YYYY HH24:MI:SS') Please suggest me how to put a filter on this date.
Thanks
Sudhir

Answer 1

Sudhir_Meru wrote:
SELECT * FROM
( SELECT
CAST( TICKETID AS VARCHAR2(4000)) TICKETID,
CAST(CUSTOMERID AS VARCHAR2(4000)) CUSTOMERID,
CAST(CUSTOMEREMAIL AS VARCHAR2(4000)) CUSTOMEREMAIL,
CAST(CREATEDBY AS VARCHAR2(4000)) CREATEDBY,
TO_CHAR (TO_DATE ( CAST (DATECREATED AS VARCHAR2 (4000)) , 'Mon DD YYYY HH:MIAM'),'DD-MM-YYYY HH24:MI:SS') DATECREATED
FROM TICKETS )
WHERE
DATECREATED >= TO_DATE('01-01-2010','DD-MM-YYYY HH24:MI:SS')
Plainly un-necessary CHAR-DATE-CHAR conversion and CHAR - Date comparison.
Why do you need it?
Just use
TO_DATE ( CAST (DATECREATED AS VARCHAR2 (4000)) , 'Mon DD YYYY HH:MIAM')          DATECREATEDAnd then you can do
datecreated >= to_date('01-01-2010 00:00:00', 'DD-MM-YYYY HH24:MI:SS')