Tutorial#59 How to Use Primary key Constraint in Oracle SQL Database|Primary key Constraint in SQL

Know about Primary Key Constraint in Oracle SQL Database or what is Constraints and Types of Constraints in an Oracle SQL Database | integrity Constraints in SQL
Primary Key Constraint is nothing but its allowing Unique and Not null Values in columns
Explaining constraints and types of constraints in Oracle or Constraints in Oracle SQL database or Constraints is nothing but a set of rules which is applied to the columns of any table in the database
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[SQLbyKhan]

Correction: We can enforce PK on group of columns as well single column.

[akashrawat]

Sir if I have a table with many entries . Now I want to implement constraint like not null . So if my column contains null key but I want the old entries to remain there. Your are deleting the data to alter table. I don't want to delete the already present data.

[tarachandra]

Sir if we do not gives any value even not mentioning NULL value directly entering second field onwards, so it will work or not .

[charlietriades]

How to check which constraint is applied on column using queries?

[sourabhkinekar]

Hello. how to *remove primary key* in already existing table...Please reply...

[tirumalasettyvamsikrishna]

how to remove constraints i have use alter modify but still displays constraints when desc is executed

[syedsabeer]

Audio and video is in different pich...

[veeru-]

I think puneet superstart copied you 😂😂