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SQL> show user
USER is "SYS"
SQL> create user t1 identified by t1;
create user t1 identified by t1
*
ERROR at line 1:
ORA-01920: user name 'T1' conflicts with another user or role name
SQL> drop user t1 cascade;
User dropped.
SQL> create user t1 identified by t1;
User created.
SQL> grant connect to t1;
Grant succeeded.
SQL> conn t1/t1
Connected.
SQL> conn / as sysdba
Connected.
SQL> desc user$
Name Null? Type
----------------------------------------- -------- ----------------------------
USER# NOT NULL NUMBER
NAME NOT NULL VARCHAR2(30)
TYPE# NOT NULL NUMBER
PASSWORD VARCHAR2(30)
DATATS# NOT NULL NUMBER
TEMPTS# NOT NULL NUMBER
CTIME NOT NULL DATE
PTIME DATE //¾ÍÊÇÕâ¸ö×ֶδú±íÁËÓû§×î½üÒ»´ÎÃÜÂë¸ü¸ÄµÄʱ¼ä
EXPTIME DATE
LTIME DATE
RESOURCE$ NOT NULL NUMBER
AUDIT$ VARCHAR2(38)
DEFROLE NOT NULL NUMBER
DEFGRP# NUMBER
DEFGRP_SEQ# NUMBER
ASTATUS NOT NULL NUMBER
LCOUNT NOT NULL NUMBER
DEFSCHCLASS VARCHAR2(30)
EXT_USERNAME VARCHAR2(4000)
SPARE1 NUMBER
SPARE2 NUMBER
SPARE3 NUMBER
SPA


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