Please see the image, I got the error just shortly after I upgraded Joomla 2.5 website to Joomla 3.4.4
This will really be a great help for me anyone can help.
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This error generally arises because of mismatch in columns present in Joomla3x and Joomla2.5 tables. To fix this, follow the following steps:
1) If you can access administrator section, then click on the Extension Manager > Database tab > Click Fix button.
2) If you cannot access the Database view in admin, then achieve the above step by entering in the URL:
--This will fix all the database warnings and errors.
If this also doesn't work for you then try updating from scratch.
Hope this helps.