什么是(默认的)字符集:
MySQL数据库 MySQL表 MySQL列
什么是(默认的)字符集:
MySQL数据库 MySQL表 MySQL列
当前回答
对于服务器上的所有数据库:
mysql> SELECT SCHEMA_NAME 'database', default_character_set_name 'charset', DEFAULT_COLLATION_NAME 'collation' FROM information_schema.SCHEMATA;
输出:
+----------------------------+---------+--------------------+
| database | charset | collation |
+----------------------------+---------+--------------------+
| information_schema | utf8 | utf8_general_ci |
| my_database | latin1 | latin1_swedish_ci |
...
+----------------------------+---------+--------------------+
对于单个数据库:
mysql> USE my_database;
mysql> show variables like "character_set_database";
输出:
+----------------------------+---------+
| Variable_name | Value |
+----------------------------+---------+
| character_set_database | latin1 |
+----------------------------+---------+
获取表的排序规则:
mysql> USE my_database;
mysql> SHOW TABLE STATUS WHERE NAME LIKE 'my_tablename';
OR -将输出创建表的完整SQL语句:
Mysql >创建表my_tablename
获取列的排序规则:
mysql> SHOW FULL COLUMNS FROM my_tablename;
输出:
+---------+--------------+--------------------+ ....
| field | type | collation |
+---------+--------------+--------------------+ ....
| id | int(10) | (NULL) |
| key | varchar(255) | latin1_swedish_ci |
| value | varchar(255) | latin1_swedish_ci |
+---------+--------------+--------------------+ ....
其他回答
数据库:
SELECT SCHEMA_NAME 'database', default_character_set_name 'charset', DEFAULT_COLLATION_NAME 'collation' FROM information_schema.SCHEMATA;
示例输出:
mysql> SELECT SCHEMA_NAME 'database', default_character_set_name 'charset', DEFAULT_COLLATION_NAME 'collation' FROM information_schema.SCHEMATA;
+----------------------------+---------+--------------------+
| database | charset | collation |
+----------------------------+---------+--------------------+
| information_schema | utf8 | utf8_general_ci |
| drupal_demo1 | utf8 | utf8_general_ci |
| drupal_demo2 | utf8 | utf8_general_ci |
| drupal_demo3 | utf8 | utf8_general_ci |
| drupal_demo4 | utf8 | utf8_general_ci |
| drupal_demo5 | latin1 | latin1_swedish_ci |
...
+----------------------------+---------+--------------------+
55 rows in set (0.00 sec)
mysql>
要查看数据库的默认排序规则:
USE db_name;
SELECT @@character_set_database, @@collation_database;
要查看表格的排序:
SHOW TABLE STATUS where name like 'table_name';
要查看列的排序规则:
SHOW FULL COLUMNS FROM table_name;
查看表的默认字符集
SHOW CREATE TABLE table_name;
列:
SHOW FULL COLUMNS FROM table_name;
数据库:
只需使用这些命令:
USE db_name;
SELECT @@character_set_database;
-- or:
-- SELECT @@collation_database;
正如前面所写的,SHOW FULL COLUMNS应该是获取列信息的首选方法。 缺少的是在不直接到达元数据表的情况下获取字符集的方法:
SHOW FULL COLUMNS FROM my_table WHERE Field = 'my_field'
SHOW COLLATION WHERE Collation = 'collation_you_got'