With optimistic concurrency control, the database manager releases the row or page locks immediately after a read operation.
通过使用乐观并发控制，数据库管理器在完成读操作之后可以立即释放行或页锁。
2
The retry is used in case a concurrency exception does occur in the query table execution and the query table engine needs to retry the claim operation.
重试仅用于查询表执行时出现并发异常且查询表需要重新申明的情况下。
3
You can also select Use optimistic concurrency to specify that you want the commands to determine whether the data has been modified before an update or delete operation is performed.