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¶ÔÓû§½âËø:alter user username account unlock;
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alter user username identified by newPassword;
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CREATE USER username IDENTIFIED BY password;
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GRANT CREATE SESSION TO username;(²Å¿ÉµÇ¼)
GRANT CONNENT,RESOURCE TO username;(½øÐд´½¨±íÖ®ÀàµÄ²Ù×÷)
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REVOKE ȨÏÞ ON Óû§±íÃû³Æ from Óû§;


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CREATE TABLE T(ID INTEGER);
CREATE VIEW V1 AS SELECT * from T;
CREATE VIEW V2 AS SELECT * from T WITH READ ONLY;
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INSERT INTO V1 VALUES(1);
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