Tutorial#58 How to Use Unique key Constraint in Oracle SQL Database| unique key Constraint in SQL

How to use Unique Key Constraint in Oracle or what is Constraints and Types of Constraints in an Oracle SQL Database | integrity Constraints in SQL
Unique Key Constraint is nothing but its allowing Unique and 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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[skabdulkarim]

After Making A Column Primary Key can I back into a normal one?

[subramaniansubramanian]

ALTER TABLE supplier
MODIFY supplier_id NUMERIC(10) UNIQUE ;

can i alter like this ?

[ajedits]

sir one Question is ( supplier_uk ) what does the uk mean ?