Adding a Primary Key to a Table

PRIMARY Key in MariaDB

PRIMARY key is a very important part of the database, it gives each record in a table a unique value making sure values aren’t the same. This guarantees that no two records have the same value in the column picked as the PRIMARY key....

Defining a Primary Key

When we make­ a table in MariaDB, we pick the column or group of columns to be­ the PRIMARY key. This chosen columns must have­ only unique values. The syste­m helps enforce this rule­, no duplicate values allowed....

Adding a Primary Key to a Table

To add a primary key in a table­ that’s already there, we­ use an ALTER TABLE statement. We ge­t the choice to make a ne­w column or use one that’s already the­re as the primary key. The­ query for doing this :...

Dropping a Primary Key From a Table

Removing a primary key from a table is needy in certain scenarios. We’ll explore the syntax and steps involved in dropping a primary key, emphasizing the careful considerations to maintain data integrity....

Primary Key and Auto_Increment Column

Understanding the relationship between primary keys and auto_increment columns is reuqired for efficient database management. We’ll discuss how an auto_increment column can be part of a primary key and its implications....

Multiple MariaDB Primary Key Example

Several examples will be provided to illustrate different scenarios of defining primary keys, including single-column primary keys, composite primary keys, and primary keys with auto_increment columns....

Conclusion

In this article, We have learned about the PRIMARY Key in which Primary Keys ensure each row in a table has a unique, non-null value and preventing data duplication and maintaining data integrity....