oracle SET TRANSACTIONNAMEREAD ONLY和READ WRITEISOLATION LEVELUSE ROLLBACK SEGMENT
详细文档：http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_10005.htm#SQLRF01705语法：set_transaction::=NAMEC:\>sqlplus "/as sysdba"SQL*Plus: Release 10.2.0.1.0 -
