Primary Vs Secondary Index
Criteria |
Primary Index |
Secondary Index |
---|---|---|
Creation Trigger |
Automatically with PRIMARY KEY |
Explicitly with CREATE INDEX |
Uniqueness |
Enforces uniqueness |
Does not enforce uniqueness |
Number of Indexes |
Only one allowed per table |
Multiple allowed in the table |
Column Selection |
Typically on primary key column(s) |
Can be on any column(s) |
Purpose |
Uniquely identifies records |
Improves query performance |
Storage Overhead |
May have additional storage overhead |
Can contribute to storage overhead |
Deletion Impact |
Removes primary key constraint |
Deletion does not affect table structure |
Query Optimization |
valuable for primary key lookups |
Enhances performance for specific queries |
The primary index is key to searches records easily. Secondary indexes speed up searches on certain columns. So sometimes, we use them to help. Other times, we don’t. It helps keep things quick and efficient.
Creating an index in MariaDB
MariaDB is an open–source and database management system. MariaDB is used for several purposes like as data warehousing, e-commerce, and logging applications. MariaDB is faster than MySQL in the replication and querying process. MariaDB supports invisible columns and temporary table space.
In this article, We will understand Creating an Index, the need for Indexing and creating various indexes for understanding, and so on.
It is useful to understand the MariaDB CREATE INDEX command. This boosts the speed of queries and makes databases work better, it increases query speed and improves database function.
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