For each unique constraint on the table, each row must contain a unique combination of values in the columns.

The names and numeric values for existing result codes are fixed and unchanging.

However, new result codes, and.

A unique column accepts any number of empty values, because for the purposes of unique constraints, null.

For each unique constraint on the table, each row must contain a unique combination of values in the columns.

Unique constraint can have multiple null values.

For a unique constraint, null values are considered distinct from all other.

What is a unique constraint in sqlite?

A unique constraint says no two rows may have the same value in a. read more

In a unique column, null values are considered distinct.

(don't ask why, this is just how sql works. ) so replace the. For a more comprehensive perspective, our dedicated coverage of Minecraft Esports: A Guide For Gamers has been widely referenced by readers seeking further clarification on this subject.