# use-db-column
Column references, type labels, defaults, nullability, ordinals, and metadata.
This crate is part of the use-database facade workspace. It provides small,
engine-neutral vocabulary types and metadata containers. It does not connect to
databases, execute queries, run migrations, parse SQL, or model engine-specific
behavior.
## Example
~~~rust
use use_db_column::{ColumnRef, ColumnTypeLabel};
use use_db_name::ColumnName;
let column = ColumnRef::new(ColumnName::new("id").expect("valid column"));
let label = ColumnTypeLabel::new("uuid").expect("valid type label");
assert_eq!(column.column().as_str(), "id");
assert_eq!(label.as_str(), "uuid");
~~~