Vector may refer to:
- The mathematical concept of a vector. Lots of things are actually vectors and the term is misused.
- The Actian Vector DBMS, formerly known as Vectorwise.
- A sort-of-small sequence of values within of a database table column. The column is itself a vector of values (see above), but some DBMSes (e.g. Actian Vector) work on such sequences atomically for various reasons.