MySql中delimiter究竟可以起到些什么作用呢?可能不少人都有这样的疑惑,下文就为您介绍MySql中delimiter的作用,供您参考. MYSQL导出一个SQL后: DELIMITER $$ DROP TRIGGER IF EXISTS `updateegopriceondelete`$$ CREATE TRIGGER `updateegopriceondelete` AFTER DELETE ON `customerinfo`
ARC中的@autoreleasepool还有作用吗? QUESTION For the most part with ARC (Automatic Reference Counting), we don't need to think about memory management at all with Objective-C objects. It is not permitted to create NSAutoreleasePools anymore, however there is