MySQL collation names follow these conventions:
A collation name starts with the name of the character set with which it is associated, followed by one or more suffixes indicating other collation characteristics. For example,
latin_swedish_ciare collations for the
latin1character sets, respectively.
A language-specific collation includes a language name. For example,
utf8_hungarian_cisort characters for the
utf8character set using the rules of Turkish and Hungarian, respectively.
Case sensitivity for sorting is indicated by
_cs(case sensitive), or
_bin(binary; character comparisons are based on character binary code values). For example,
latin1_general_ciis case insensitive,
latin1_general_csis case sensitive, and
latin1_binuses binary code values.
For Unicode, the
collations preserve the pre-5.1.24 ordering of the original
collations and permit upgrades for tables created before MySQL 5.1.24. For more information, see Section 2.11.3, “Checking Whether Tables or Indexes Must Be Rebuilt”, and Section 2.11.4, “Rebuilding or Repairing Tables or Indexes”.