mysql dump select_mysqldump导出数据库报mysqldump: Couldn't execute 'SELECT
mysqldump命令：导出数据库：mysqldump -h ip -u root -p dbname > db.sql;导出数据库中的某个表：mysqldump -h ip -u root -p dbname tablename > tablename.sql;错误提示：mysqldump: Couldn't execute 'SELECT COLUMN_NAME, JSON_EXT...
