描述

该语句用来设置当前连接的数据库的字符集编码。

格式

  1. SET NAMES 'charset_name' [COLLATE 'collation_name']

参数解释

参数

描述

charset_name

指定字符集

collation_name

指定字符集排序规则。如未指定，则使用字符集默认排序规则。

说明

该语句将三个会话系统变量 character_set_client ， character_set_connection 和 character_set_results 设置为给定的字符集。将 character_set_connection 设置为 charset_name ，将 collation_connection 设置为 charset_name 的默认排序规则。

示例

  • 设置数据库的字符集和排序规则。
  1. OceanBase(admin@test)>SET NAMES 'utf8mb4' COLLATE 'utf8mb4_general_ci';
  2. Query OK, 0 rows affected (0.00 sec)
  4. OceanBase(admin@test)>show variables like 'character_set_c%';
  5. +--------------------------+---------+
  6. | Variable_name            | Value   |
  7. +--------------------------+---------+
  8. | character_set_client     | utf8mb4 |
  9. | character_set_connection | utf8mb4 |
  10. +--------------------------+---------+
  11. 2 rows in set (0.01 sec)
  13. OceanBase(admin@test)>show variables like 'collation_connection';
  14. +----------------------+--------------------+
  15. | Variable_name        | Value              |
  16. +----------------------+--------------------+
  17. | collation_connection | utf8mb4_general_ci |
  18. +----------------------+--------------------+
  19. 1 row in set (0.05 sec)
  22. OceanBase(admin@test)>SET NAMES 'gbk';
  23. Query OK, 0 rows affected (0.02 sec)
  25. OceanBase(admin@test)>show variables like 'character_set_c%';
  26. +--------------------------+-------+
  27. | Variable_name            | Value |
  28. +--------------------------+-------+
  29. | character_set_client     | gbk   |
  30. | character_set_connection | gbk   |
  31. +--------------------------+-------+
  32. 2 rows in set (0.01 sec)
  35. OceanBase(admin@test)>show variables like 'collation_connection';
  36. +----------------------+----------------+
  37. | Variable_name        | Value          |
  38. +----------------------+----------------+
  39. | collation_connection | gbk_chinese_ci |
  40. +----------------------+----------------+
  41. 1 row in set (0.01 sec)