Jul 29, 2016 · I came across this issue in Oracle 12g r 2. The desc MY_TABLE did not show the NOT NULL for a column that did have a NOT NULL constraint.
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Mar 10, 2010 · You solve this problem by not having this as a primary key. Primary keys cannot be NULL or, if they're composite primary keys, ...
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Nov 1, 2022 · A primary key is after all just a unique constraint on certain not nullable columns in the table. You want a unique key on the columns ...
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Mar 7, 2020 · You must first describe what is your primary key in the table. I suspect that also the VERSION columns is corrupted by the invalid ETL (shouldn' ...
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I have a table with 4 columns which would uniquely identify a row. For each row, two of these columns will always be populated. The other two columns will ...
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Mar 12, 2014 · The question is: "Which employee served the most number of customers? " Your query does not even return information about the employee, ...
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Jun 5, 2021 · The payment tables primary key will be NID which will be inherited from Employee and Client table. If we merge both NID columns from the ...
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Jan 27, 2022 · So, in above scenario, I got ISBN and unique ID are composite primary keys of "Book" Entity. It is consider the unique ID if a book has multiple ...
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Mar 11, 2010 · Oracle treats empty VARCHAR fields as synonymous to NULL , which is somewhat controversial but it is something you have to live with. So you can ...
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