Apache Derby DB Error Code 42831 – ‘‘ cannot be a column of a primary key or unique

Posted by AbundantCode

In this blog post, let’s learn about the error message “42831- ‘‘ cannot be a column of a primary key or unique” in Apache Derby Database and the description of the error.

Error Message

42831- ‘‘ cannot be a column of a primary key or unique

Error Details

‘‘ cannot be a column of a primary key or unique key because it can contain null values.