In case you wanted for example to change all your MyISAM tables into InnoDB , and you didn’t want to go over the tables one by one, you can do the following queries.
First check that you’re doing it on the proper database.
USE information_schema; SELECT TABLE_SCHEMA, TABLE_NAME FROM TABLES WHERE TABLE_SCHEMA = "your_db_name";
If it returns what you need you can then run:
SELECT CONCAT("ALTER TABLE `", TABLE_SCHEMA,"`.`", TABLE_NAME, "` ENGINE = INNODB; ") as MySQLCMD FROM TABLES WHERE TABLE_SCHEMA = "your_db_name";