Dropping the Unique Constraint in the Table

Create Database

For performing the operations in the table in a particular database. we have to create a table in the database. we can create a database with the help of the below syntax....

Creating a Table with Constraints

Before getting to use the constraints while creating a table in the database we will get to know about the constraint meaning and the constraints available in the mariaDB . we will discuss about the check constraint and unique constraint in the MariaDB....

Creating Table Without Constraints

Query:...

Using the Unique Constraint

The unique constraint in the MariaDB is used to check whether the values in the column are unique or not. It should have mainly atomic values....

Adding the Unique Constraint to the Table

In this we will use the alter keyword to add the unique constraint to the table. First we will create a table in the database without any constraints in the database. Then will use the alter along with the unique constraint to add the unique constraint to the given column. First we will create a table without any constraint in database....

Dropping the Unique Constraint in the Table

Query:...

Conclusion

The Constraints that were created in any of the table helps us to prevent the duplication of data. The problem is that whenever the problem of data duplication occurs in the data base then processing the queries will be difficult . The constraints are also used to keep the records in the database based on the field data type. It is because whenever we want to insert the data in a proper format the constraints will restrict the insertion of data when we insert the data in the improper format....