MySQL 데이터베이스 / 테이블 / 열이 어떤 문자 집합인지 어떻게 알 수 있습니까?

MySQL 데이터베이스 / 테이블 / 열이 어떤 문자 집합인지 어떻게 알 수 있습니까?

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다음에 대한 (기본값) 문자 세트는 무엇입니까?

• MySQL 데이터베이스

• MySQL 테이블

• MySQL 열

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방법은 다음과 같습니다.

스키마의 경우 :

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

테이블의 경우 :

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";

열의 경우 :

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

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대한 열 :

SHOW FULL COLUMNS FROM table_name;

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대한 데이터베이스 :

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

Cf. 이 페이지 . 그리고 MySQL 매뉴얼을 확인하십시오.

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서버에있는 모든 데이터베이스의 경우 :

mysql> SELECT SCHEMA_NAME 'database', default_character_set_name 'charset', DEFAULT_COLLATION_NAME 'collation' FROM information_schema.SCHEMATA;

산출:

+----------------------------+---------+--------------------+
| database                   | charset | collation          |
+----------------------------+---------+--------------------+
| information_schema         | utf8    | utf8_general_ci    |
| my_database                | latin1  | latin1_swedish_ci  |
...
+----------------------------+---------+--------------------+

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A에 대한 하나의 데이터베이스 :

mysql> USE my_database;
mysql> show variables like "character_set_database";

산출:

    +----------------------------+---------+
    | Variable_name              |  Value  |
    +----------------------------+---------+
    | character_set_database     |  latin1 | 
    +----------------------------+---------+

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테이블에 대한 데이터 정렬 가져 오기 :

mysql> USE my_database;
mysql> SHOW TABLE STATUS WHERE NAME LIKE 'my_tablename';

또는-테이블 작성에 대한 전체 SQL을 출력합니다.

mysql> show create table my_tablename

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열 데이터 정렬 가져 오기 :

mysql> SHOW FULL COLUMNS FROM my_tablename;

산출:

+---------+--------------+--------------------+ ....
| field   | type         | collation          |
+---------+--------------+--------------------+ ....
| id      | int(10)      | (NULL)             |
| key     | varchar(255) | latin1_swedish_ci  |
| value   | varchar(255) | latin1_swedish_ci  |
+---------+--------------+--------------------+ ....

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들어 테이블 :

SHOW TABLE STATUS 모든 테이블을 나열합니다.

다음을 사용하여 필터링 :

SHOW TABLE STATUS where name like 'table_123';

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대한 데이터베이스 :

다음 명령을 사용하십시오.

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

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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
;

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To see default collation of the database:

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

To see collation of the table:

SHOW TABLE STATUS where name like 'table_name';

To see collation of the columns:

SHOW FULL COLUMNS FROM table_name;

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I always just look at SHOW CREATE TABLE mydatabase.mytable.

For the database, it appears you need to look at SELECT DEFAULT_CHARACTER_SET_NAME FROM information_schema.SCHEMATA.

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For tables and columns:

show create table your_table_name

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For databases:

SELECT SCHEMA_NAME 'database', default_character_set_name 'charset', DEFAULT_COLLATION_NAME 'collation' FROM information_schema.SCHEMATA;

Example output:

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> 

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For databases:

SHOW CREATE DATABASE "DB_NAME_HERE";

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In creating a Database (MySQL), default character set/collation is always LATIN, instead that you have selected a different one on initially creating your database

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As many wrote earlier, SHOW FULL COLUMNS should be the preferred method to get column information. What's missing is a way to get charset after that without reaching metadata tables directly:

SHOW FULL COLUMNS FROM my_table WHERE Field = 'my_field'
SHOW COLLATION WHERE Collation = 'collation_you_got'

참고URL : https://stackoverflow.com/questions/1049728/how-do-i-see-what-character-set-a-mysql-database-table-column-is