Convert SQL SERVER DATETIME into ORACLE TIMESTAMP

I have to convert a column's datatype.
The source column's datatype is DATETIME which is in SQL Server to TIMESTAMP(datatype in target which is oracle)
Can anyone help me please

Just issue ALTER TABLE MODIFY:
SQL> create table tbl(c date)
2 /
Table created.
SQL> insert into tbl values(sysdate)
2 /
1 row created.
SQL> select to_char(c,'mm/dd/yyyy hh24:mi:ss') from tbl
2 /
TO_CHAR(C,'MM/DD/YY
12/26/2009 20:50:58
SQL> alter table tbl modify c timestamp
2 /
Table altered.
SQL> select c from tbl
2 /
C
26-DEC-09 08.50.58.000000 PM
SQL> SY.

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As you can see, whoever wrote the load script thought it would be totally awesome to convert hex (binary?) data to generate a date, instead of using data readable by a human being.
BTW, the date generated is 2010-01-13 00:00:00.000.
After Reading The Fabulous Manual and searching the OTN Discussion Fora, what I came up with is
INSERT INTO MMAB_Invoices (CustomerID, InvoiceDate, ProductTotal, SalesTax, Shipping, InvoiceTotal) VALUES (20, TO_DATE(UTL_RAW.CAST_TO_VARCHAR2(HEXTORAW('00009CFD00000000')), 'YYYY-MM-DD HH:MI:SS'), 151.0000, 11.3300, 6.2500, 168.5800);
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Error starting at line 846 in command:
INSERT INTO MMAB_Invoices (CustomerID, InvoiceDate, ProductTotal, SalesTax, Shipping, InvoiceTotal) VALUES (20, TO_DATE(UTL_RAW.CAST_TO_VARCHAR2(HEXTORAW('00009CFD00000000')), 'YYYY-MM-DD HH:MI:SS'), 151.0000, 11.3300, 6.2500, 168.5800)
Error report:
SQL Error: ORA-01841: (full) year must be between -4713 and +9999, and not be 0
*01841. 00000 - "(full) year must be between -4713 and +9999, and not be 0"*
**Cause: Illegal year entered*
**Action: Input year in the specified range*
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P.S. Happy New Year!!!

Your hex conversion is certainly not returning a date format:
sql> select UTL_RAW.CAST_TO_VARCHAR2(HEXTORAW('00009CFD00000000')) from dual;
UTL_RAW.CAST_TO_VARCHAR2(HEXTORAW('00009CFD00000000'))
┐²To convert the hex number to decimal, simply use to_number:
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1.7261E+14Now, before you can make any further calculations with that number, you need to know how it represents the date of 2010-01-13. Luckily, we've got Google nowadays. ;-)
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40189
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TO_DATE('
13-JAN-10So, the conversion would be something like this:
sql> select to_date('1900-01-01','yyyy-mm-dd') + to_number(substr('00009CFD00000000',1,8), 'xxxxxxxx') + to_number(substr('00009CFD00000000',9,8), 'xxxxxxxx') / (24*60*60*1000) from dual;
TO_DATE('
13-JAN-10Note: Oracle DATE format specifies a datetime up to the second, whereas the sqlserver DATETIME format specifies a datetime up to the millisecond; if that precision is needed, use Oracle's TIMESTAMP instead.
Note: using an internal representation is risky, implementation details may change. In this case, it seems pretty unlikely that Microsoft will ever change the datetime internal representation, since that would break lots and lots of code.
Edited by: theoa on 2-jan-2012 9:14

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