批量更新数据库表以及表字段编码

查询需要更新编码的表，并生成相应的更新SQL

SELECT CONCAT('ALTER TABLE ', table_name, ' CONVERT TO CHARACTER SET  utf8 COLLATE utf8_general_ci;')
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = 'drea_open' and TABLE_COLLATION != 'utf8_general_ci'

查询需要更新编码的表字段，并生成相应的更新SQL

SELECT CONCAT('ALTER TABLE `', table_name, '` MODIFY `', column_name, '` ', DATA_TYPE, '(', CHARACTER_MAXIMUM_LENGTH, ') CHARACTER SET utf8 COLLATE utf8_general_ci', (CASE WHEN IS_NULLABLE = 'NO' THEN ' NOT NULL' ELSE '' END), ';')
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = 'drea_open'
AND DATA_TYPE = 'varchar'
AND
(
    CHARACTER_SET_NAME != 'utf8'
    OR
    COLLATION_NAME != 'utf8_general_ci'
)