关于innoDB锁,下面描述正确的是A.InnoDB通过对索引项加锁实现行锁.B.InnoDB锁能够避免并发更新造成更新丢失.C.InnoDB中一个正在执行的事务中更新了多行记录,已经更新了的行上锁会自动释放.D.InnoDB中select for update操作和update操作所加的锁不同.
关于innoDB锁,下面描述正确的是
A.InnoDB通过对索引项加锁实现行锁.
B.InnoDB锁能够避免并发更新造成更新丢失.
C.InnoDB中一个正在执行的事务中更新了多行记录,已经更新了的行上锁会自动释放.
D.InnoDB中select for update操作和update操作所加的锁不同.
参考答案和解析
InnoDB通过对索引项加锁实现行锁.;InnoDB锁能够避免并发更新造成更新丢失.
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