How Oracle Add NOT NULL Constraint
Add NOT NULL Constraint As I mentioned in resolving ORA-00904 for adding a constraint, NOT NULL is a constraint, but it's more like an attribute… Read More »How Oracle Add NOT NULL Constraint
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How Oracle Remove NOT NULL Constraint
Before we talk about how to remove NOT NULL constraint, I assume that you have already know how to add a NOT NULL constraint to… Read More »How Oracle Remove NOT NULL Constraint
How to Resolve ORA-00904 Invalid Identifier
ORA-00904 ORA-00904 means that you used an invalid identifier which is mostly an unmatched column name or used an incorrect or unqualified syntax in your… Read More »How to Resolve ORA-00904 Invalid Identifier