MYISAM:
does not support transactions rollback and row level locking.
INNO DB:
supports above features as well as ACID (Atomicity, consistency, isolation, and durability).
To convert from MyISAM to InnoDB use script:
SET NAMES utf8; SET FOREIGN_KEY_CHECKS = 0; ALTER TABLE table_name1 TYPE = innodb; ALTER TABLE table_name2 TYPE = innodb; SET FOREIGN_KEY_CHECKS = 1;