Dec 2, 2012 · Yes, as @eaolson said, you don't need to specify NOT NULL for primary key columns, they are set automatically to NOT NULL. However, Oracle keeps ...

Dec 15, 2013 · My question is I could not understand the meaning of "ENABLE" in this statement. What would be the difference if we just define as "NAME" ...

Dec 4, 2021 · The error is obvious: column room_charges in table room_details is not primary key or unique. It probably really isn't unique; the primary key ...

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.

Apr 14, 2016 · In order to get around the key issue, I picked a primary key that would at least not fail a null check, in this case just the assess_id and ...

Apr 19, 2013 · Primary keys cannot be Null. A PK must be unique, and Null isn't. Also, int is not a nullable type, so it's default value is 0.

Aug 8, 2008 · The primary key serves three purposes: indicates that the column(s) should be unique; indicates that the column(s) should be non-null ...

May 29, 2009 · My question is in regards to the use of primary keys as functional parts of a table (and not assigning "ID" numbers to every table just because) ...