解决方法
在Oracle中,默认操作模式是Read committed isolation level,其中select语句不会被另一个修改其正在读取的数据的事务阻塞.
从 Data Concurrency and Consistency开始：
从 Data Concurrency and Consistency开始：
Each query executed by a transaction sees only data that was committed before the query (not the transaction) began. An Oracle query never reads dirty (uncommitted) data.
