ORA-01843: not a valid month

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Good day everybody,
i need a help from everyone,First of all i create a table in oracle DATA it having a some some columns one of that column i create a date format now i getting connection in c# using oracle database...Finally i retrived everything from that table using C# coding but one error shows when i exceuted gridview in table using asp.net that coding error shows ORA-01843: not a valid month...please help me for that problem.........

Posted 19-Mar-12 20:16pm

Ashok 4

Updated 19-Mar-12 20:21pm

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Dinesh Mani 20-Mar-12 2:31am

Please share the code that is throwing this error!

youssef_123 20-Mar-12 2:34am

yes please share the code

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V. · Accepted Answer · 2012-03-19T22:25:00

If you're not using parametrized queries, please rethink your strategy.
My guess is you're converting your DateTime object explicitly or implicitly to a string. This can lead to the problem you have here.

If you do not want to use parametrized queries (again I urge you to do so) you can use this in your query:

DateTime mydts = DateTime.Now;
"... TO_DATE("+mydts.ToString("dd/MM/yyyy")+", 'DD/MM/YYYY') ...."

Look up the TO_DATE function in google.

For testing purposes, try this in Oracle:

SQL

Select TO_DATE('26/02/2010', 'DD/MM/YYYY') from dual;

this will go wrong (ORA-01843):

SQL

Select TO_DATE('02/26/2010', 'DD/MM/YYYY') from dual;

Again, again and again: USE PARAMETRIZED QUERIES ! (Lookup "SQL injection" in google.)