sw

mysql> show variables like 'collation%';
+----------------------+--------------------+
| Variable_name        | Value              |
+----------------------+--------------------+
| collation_connection | utf8mb4_general_ci |
| collation_database   | utf8_general_ci    |
| collation_server     | utf8_unicode_ci    |
+----------------------+--------------------+
3 rows in set
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原文地址：https://www.cnblogs.com/yhq-qhh/p/14442484.html