# LIKE transformations

This section describes using LIKE transformations as a comparison operator.

Note: LIKE transformations and optimizations are disabled when you use territory-based collation. See "Character-based collation in Derby" in the Derby Developer's Guide for information about territory-based collation.

- Character string beginning with constant
- Character string without wildcards
- Unknown parameter

Parent topic: Predicate transformations
Related reference
BETWEEN transformations
Simple IN predicate transformations
NOT IN predicate transformations
OR transformations