Contents
Why an integer is better as a primary key?
Why Integers Make Good Primary Keys It’s often easier to use an integer for indexing, in comparison to a string or composite key, because it lends itself well to treating results (conceptually or in practice) as an array.
Should I use auto-increment or UUID?
In terms of performance, there shouldn’t be any noticeable difference using auto-increment over UUID . Most posts (including some by the authors of this site), state as such. Of course UUID may take a little more time (and space), but this is not a performance bottleneck for most (if not all) cases.
How do I choose a Cassandra partition key?
When choose the Partition Key you can use this rules of thumb:
- 1 Partition Key should have < 100k rows. But remember you shouldn’t make it unique.
- 1 partition key should have < 100 MB size. To calculate it you could count the data type size that you used in your model.
When to use UUID or INT for primary key?
By using UUID, you can generate the primary key value of the parent table up front and insert rows into both parent and child tables at the same time within a transaction. Besides the advantages, UUID values also come with some disadvantages:
Which is better as a primary key Guid or INT?
Guid vs INT – Which is better as a primary key? I’ve being reading around reasons to use or not Guid and int. int is smaller, faster, easy to remember, keeps a chronological sequence. And as for Guid, the only advantage I found is that it is unique.
Which is better for performance int or UUID?
Of course UUID may take a little more time (and space), but this is not a performance bottleneck for most (if not all) cases. Having a column as Primary Key should make both choices equal wrt to performance.
What does UUID stand for in MySQL PK?
Summary: this tutorial introduces you to MySQL UUID, shows you to use it as the primary key (PK) for a table, and discusses the pros and cons of using it as the primary key. UUID stands for Universally Unique IDentifier. UUID is defined based on RFC 4122, “a Universally Unique Identifier (UUID) URN Namespace).