快速修改MySQL字段类型 - camash

快速修改MySQL字段类型

方法： 直接从系统视图构造修改的sql

select 
concat(\'alter table \'
       ,table_name
       ,\' CHANGE \'
       ,COLUMN_NAME, \' \'
       ,COLUMN_NAME, \' \'
       ,DATA_TYPE
       ,\'(\'
       ,CHARACTER_MAXIMUM_LENGTH
       ,\') CHARACTER SET utf8 COLLATE utf8_general_ci comment "\'
       ,COLUMN_COMMENT
       ,\'";\'
      )
from information_schema.`COLUMNS` where TABLE_NAME=\'YOUR_TABLE\'
and CHARACTER_SET_NAME = \'latin1\'

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