摘要： Lock:参考如下网址:http://broadh2o.net/docs/database/oracle/oracleLocks.html http://docs.oracle.com/cd/E11882_01/server.112/e10592/ap_locks001.htm#SQLRF55502 (Automatic Locks in DML Operations) http://docs.oracle.com/cd/E11882_01/server.112/e25789/consist.htm#CNCPT1339(数据库的事务和读一致性和O... 阅读全文