Category "primary-key"

Difference between non-prime and non-key attributes in Database

I am a little bit confused between non-prime attribute and non-key attribute I have searched a bit about them and found that non-prime attribute means An attri

Dynamodb will consider the secondary index also a primary key, before put item into table.?

I have the table named as message_tbl in dynamodb for messaging system. For the purpose to fetch all the message items related to particular conversation_id,

MS Access ignores trailing space(s) in primary key validation

I have an Access table with a TEXT primary key. If I use an INSERT statement to add a row where the primary key value is 'PART' and then try to INSERT anoth

Using text as a primary key in SQLite table bad?

Is it bad to have text as a primary key in an SQLite database? I heard that it's bad for performance reasons, is this true? And will the rowid be used as the ac