mysql 修改字符集

修改数据库字符集:

ALTER  DATABASE  db_name  DEFAULT  CHARACTER  SET   character_name[COLLATE...];

把表默认的字符集和所有字符列(CHAR,VARCHAR,TEXT)改为新的字符集:

ALTER TABLE  tbl_name CONVERT TO  CHARACTER  SET   character_name[COLLATE...]如

alter table log_demo convert to character set utf8 collate utf8_general_ci;

只是修改表的默认字符集:

ALTER TABLE tbl_name  DEFAULT CHARACTER  SET  character_name[COLLATE...];如:

ALTER  TABLE logtest  DEFAULT  CHARACTER  SET    utf8  COLLATE   utf8_general_ci;

修改字段的字符集:

ALTER  TABLE  tbl_name  CHANGE  c_name c_name  CHARACTER  SET  character_name[COLLATE...];如:

ALTER  TABLE  logtest  CHANGE  title title  VARCHAR(100)  CHARACTER  SET  utf8  COLLATE  utf8_general_ci;

查看数据库编码:

SHOW  CREATE DATABASE  db_name;

查看表编码:

SHOW  CREATE  TABLE   tbl_name;

查看字段编码:

SHOW  FULL  COLUMNS  FROM  tbl_name;

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