The Role of Primary and Partition Keys in Doris (Design Best Practices)

What is a Primary Key?

A primary key (Primary Key) is a characteristic that uniquely identifies a data record, used to uniquely identify each data record. It is a core index in the database, used to implement data consistency and reliability.

Attributes of a Primary Key:

• must be unique
• must be not null

What is a Partition Key?

A partition key (Partition Key), also known as a column or row partition key, is a technology based on columns or rows for data partitioning, used to optimize database performance and storage space.

Attributes of a Partition Key:

• Partition data based on specific columns or conditions
• Can be partitioned multiple times as needed

The Role of Primary Keys and Partition Keys in Doris:

In Doris, primary keys and partition keys are two important index types, used to implement data uniqueness and efficient storage.

The Role of a Primary Key:

• Enable the database to identify the uniqueness of data records
• Provide fast query and insert operations

The Role of a Partition Key:

• Optimize database performance and storage space through partitioning technology
• Provide the best solution for applications requiring high-performance data access

Best Practices for Design:

When designing table structures, primary keys and partition keys are very important considerations. Here are some best practices:

Primary Key Design:

• Use appropriate primary key types (integers, UUIDs, etc.)
• Ensure primary key uniqueness and non-null status

Partition Key Design:

• Select appropriate partitioning strategies based on needs
• Ensure each partition is independent and meaningful