设置isolation level隔离级别

SQL > alter session set isolation_level = serializable ; Session altered. SQL > delete from t1 where rownum = 1 ; 1 row deleted. SQL > select flag from v$ transaction ; FLAG -- -------- 268439043 SQL > commit ; Commit complete. SQL > alter session set isolation_level = READ COMMITTED ; Session altered. SQL > delete from t1 where rownum = 1 ; 1 row deleted. SQL > select flag from v$ transaction ; FLAG -- -------- 3587

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