Can we modify Primary key constraint

Keep practicing — related questions

• Can Primary Key be Null?
• Can we have multiple primary keys in a table?
• Can a primary key contain more than one columns?
• Can a primary key contain more than one columns?
• Can a primary key contain more than one columns?
• NOT NULL constraint can be added using MODIFY clause of ALTER TABLE statement
• Can we change the Native Sql
• Which is not a type of constraint