我有下面的代码,假设它将检测到重复的id生成,并且不会执行。这段代码是否足够好来防止重复ids?//$guid and $alphabet are other sources from which id is generated while($unique == false){ ob_start(); $newido
我正在写sqlhelper,我的问题是:public List<T> PageListByQuery<T>(Expression<Func<T, bool>> query, string sort, string order, out int totalCount, int pageIndex = 0, i
SQLEXCEPTION SET `_rollback` = 1; START TRANSACTION;
SELECT @userid := id FROM users WHERE email=pubEmail;
INSERT INTO publisher (guid我使用的是MySQL 5.7.12,正在开发MySQL WorkBench。通过以下