Collation refers to a set of rules that determine how data is sorted and compared. Rules defining the correct character sequence are used to sort the character data. It incorporates options for specifying case-sensitivity, accent marks, kana character types and character width. Below are the different types of collation sensitivity:
Case sensitivity: A and a are treated differently.
Accent sensitivity: a and á are treated differently.
Kana sensitivity: Japanese kana characters Hiragana and Katakana are treated differently.
Width sensitivity: Same character represented in single-byte (half-width) and double-byte (full-width) are treated differently.