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

AbundantCode 5 days ago in Apache Derby 0

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.

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