10.1.7.1. Collation Names

MySQL collation names follow these rules:

A name ending in _ci indicates a case-insensitive collation.
A name ending in _cs indicates a case-sensitive collation.
A name ending in _bin indicates a binary collation. Character comparisons are based on character binary code values.
Unicode collation names may include a version number to indicate the version of the Unicode Collation Algorithm (UCA) on which the collation is based. UCA-based collations without a version number in the name use the version-4.0.0 UCA weight keys: http://www.unicode.org/Public/UCA/4.0.0/allkeys-4.0.0.txt. A collation name such as utf8_unicode_520_ci is based on UCA 5.2.0 weight keys: http://www.unicode.org/Public/UCA/5.2.0/allkeys.txt.