Collation 类型
字符集（Character Set）是一组字符符号及编码方式的组合，collation是建立在某一字符集上的字符排序规则。本文汇总了PolarDB-X支持的collation类型。
PolarDB-X支持下表所列的collation类型。关于collation类型的详细信息，请参见Collations 。
| 字符集 | collation |
|---|---|
| utf8 | utf8_general_ci |
| utf8 | utf8_bin |
| utf8 | utf8_unicode_ci |
| utf8mb4 | utf8mb4_general_ci |
| utf8mb4 | utf8mb4_bin |
| utf8mb4 | utf8mb4_unicode_ci |
| utf16 | utf16_general_ci |
| utf16 | utf16_bin |
| utf16 | utf16_unicode_ci |
| ascii | ascii_general_ci |
| ascii | ascii_bin |
| binary | binary |
| latin1 | latin1_swedish_ci |
| latin1 | latin1_german1_ci |
| latin1 | latin1_danish_ci |
| latin1 | latin1_bin |
| latin1 | latin1_general_ci |
| latin1 | latin1_general_cs |
| latin1 | latin1_spanish_ci |
| gbk | gbk_chinese_ci |
| gbk | gbk_bin |