Question

什么是（默认）字符集：

MySQL数据库
MySQL表
MySQL专栏

Answer 1

我是怎么做的 -

For Schemas：

SELECT default_character_set_name FROM information_schema.SCHEMATA 
WHERE schema_name = "schemaname";

表格：

SELECT CCSA.character_set_name FROM information_schema.`TABLES` T,
       information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA
WHERE CCSA.collation_name = T.table_collation
  AND T.table_schema = "schemaname"
  AND T.table_name = "tablename";

对于列：

SELECT character_set_name FROM information_schema.`COLUMNS` 
WHERE table_schema = "schemaname"
  AND table_name = "tablename"
  AND column_name = "columnname";

Answer 2

列：

SHOW FULL COLUMNS FROM table_name;

Answer 3

对于数据库：

USE your_database_name;
show variables like "character_set_database";
-- or:
-- show variables like "collation_database";

比照。 this page。并查看MySQL手册

Answer 4

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create table的完整SQL：

mysql> show create table my_tablename

获取列的整理：

mysql> SHOW FULL COLUMNS FROM my_tablename;

输出：

+---------+---------+--------------------+ .... | field | type | collation | +---------+---------+--------------------+ .... | id | utf8 | (NULL) | | key | utf8 | latin1_swedish_ci | | value | utf8 | latin1_swedish_ci | +---------+---------+--------------------+ ....

Answer 5

对于表格：

SHOW TABLE STATUS将列出所有表格。

使用以下过滤：

SHOW TABLE STATUS where name like 'table_123';

Answer 6

对于数据库：

只需使用以下命令：

USE db_name;
SELECT @@character_set_database;
-- or:
-- SELECT @@collation_database;

Answer 7

SELECT TABLE_SCHEMA,
       TABLE_NAME,
       CCSA.CHARACTER_SET_NAME AS DEFAULT_CHAR_SET,
       COLUMN_NAME,
       COLUMN_TYPE,
       C.CHARACTER_SET_NAME
  FROM information_schema.TABLES AS T
  JOIN information_schema.COLUMNS AS C USING (TABLE_SCHEMA, TABLE_NAME)
  JOIN information_schema.COLLATION_CHARACTER_SET_APPLICABILITY AS CCSA
       ON (T.TABLE_COLLATION = CCSA.COLLATION_NAME)
 WHERE TABLE_SCHEMA=SCHEMA()
   AND C.DATA_TYPE IN ('enum', 'varchar', 'char', 'text', 'mediumtext', 'longtext')
 ORDER BY TABLE_SCHEMA,
          TABLE_NAME,
          COLUMN_NAME
;

Answer 8

要查看数据库的默认排序规则：

USE db_name;
SELECT @@character_set_database, @@collation_database;

要查看表格的整理：

SHOW TABLE STATUS where name like 'table_name';

要查看列的整理：

SHOW FULL COLUMNS FROM table_name;

Answer 9

我总是只看SHOW CREATE TABLE mydatabase.mytable。

对于数据库，您似乎需要查看SELECT DEFAULT_CHARACTER_SET_NAME FROM information_schema.SCHEMATA。

Answer 10

对于表格和列：

show create table your_table_name

Answer 11

对于数据库：

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>

Answer 12

对于数据库：

SHOW CREATE DATABASE "DB_NAME_HERE";

在创建数据库（MySQL）时，默认字符集/排序规则始终是LATIN，而是在最初创建数据库时选择了另一个

Answer 13

正如之前所写的那样，SHOW FULL COLUMNS应该是获取列信息的首选方法。缺少什么是在没有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'

Answer 14

对于数据库： USE db_name; SELECT @@character_set_database;

Answer 15

显示全局变量，其中variable_name如'character_set_％'或variable_name如'collation％'

如何查看MySQL数据库/表/列的字符集是什么？

15 个答案: