Tutorial by Examples

Table locks can be an important tool for ENGINE=MyISAM, but are rarely useful for ENGINE=InnoDB. If you are tempted to use table locks with InnoDB, you should rethink how you are working with transactions. MySQL enables client sessions to acquire table locks explicitly for the purpose of cooperati...

If the tables use InnoDB, MySQL automatically uses row level locking so that multiple transactions can use same table simultaneously for read and write, without making each other wait. If two transactions trying to modify the same row and both uses row level locking, one of the transactions waits f...