Скачать или смотреть Tutorial#61 Check constraint in Oracle SQL Database| How to Add Check Constraints

How to use Check Constraint in Oracle or what is Constraints and Types of Constraints in an Oracle SQL Database | integrity Constraints in SQL. Check Constraint is nothing but it allows you to specify a condition on each row in the table
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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