Message=ORA-01843: not a valid month

This short blog is to resolve .NET C# insert a record to Oracle table with date format

You will very likely get the error Message=ORA-01843: not a valid month when you insert a record to Oracle table with date format using .NET C#.

You might get a link like https://www.tekstream.com/resources/ora-01843-not-a-valid-month/ and telling you to do like.

SELECT * FROM MYTABLE WHERE MYTABLE.DATEIN = TO_DATE(15/07/99, ‘DD/MM/YY’);

So I will do this to my statement

INSERT INTO BILLS_OF_LADING (NBR, LINE_ID, CREATED, CREATOR) VALUES (‘TESTIN1’, ‘MAE’, TO_DATE(2001/03/19, ‘YYYY/MM/DD’), ‘HILMY’)

Unfortunately the error is still there because you also need the single quotation mark for the date itself

INSERT INTO BILLS_OF_LADING (NBR, LINE_ID, CREATED, CREATOR) VALUES (‘TESTIN1’, ‘MAE’, TO_DATE(‘2001/03/19’, ‘YYYY/MM/DD’), ‘HILMY’)

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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