MySQL是一個常用的數據庫管理系統,而Linux是一個常用的操作系統。在使用MySQL時,有時需要查看數據庫和表所使用的字符集編碼,以確保數據的正確性。下面介紹如何在Linux中查看MySQL數據庫和表所使用的字符集編碼。
1. 查看MySQL數據庫字符集編碼
$ mysql -h [hostname] -u [username] -p Enter password: [password] mysql>show variables like 'character%';
在MySQL命令行中,使用show variables命令可以查看MySQL的各種參數設置,其中包括character_set_database和character_set_server,分別表示MySQL數據庫和服務器的字符集編碼。如下圖所示:
+--------------------------+-------------------------------------------+ | Variable_name | Value | +--------------------------+-------------------------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8mb4 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8mb4 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql-8.0.19-linux-glibc2.12... | +--------------------------+-------------------------------------------+
可以看到,character_set_database和character_set_server均為utf8mb4。
2. 查看MySQL表字符集編碼
mysql>use [database] mysql>show table status like '[table]';
使用show table status命令可以查看MySQL數據庫中表的詳細信息,其中包括Collation,即該表使用的字符集編碼。如下圖所示:
+-------------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+-------------------+----------+----------------+---------+ | Name | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collation | Checksum | Create_options | Comment | +-------------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+-------------------+----------+----------------+---------+ | [table] | InnoDB | 10 | Dynamic | 1127 | 837 | 943328 | 0 | 299008 | 0 | NULL | 2021-09-21 09:00:15 | NULL | NULL | utf8mb4_general_ci | NULL | | | +-------------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+-------------------+----------+----------------+---------+
可以看到,Collation為utf8mb4_general_ci。
以上就是在Linux中查看MySQL數據庫和表所使用的字符集編碼的方法。