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create tablespace testSP
datafile 'E:\COMPANY\rbtsql\testSP.dbf'
size 100M AutoExtend On Next 10M Maxsize 2048M
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create user janely identified by wawa
default tablespace testSP--ĬÈϱí¿Õ¼äÊÇ system
temporary tablespace temp--±£´æÁÙʱ¶ÔÏóËùʹÓõĿռä±í
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grant create session to janely
grant dba to janely
commit;
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alter user janely identified by ren;
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Drop user janely
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select * from dba_users;
select * from all_users; 
select * from user_users;
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Oracle Date Function ½²½âºÍÊÂÀý

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1 year=1*12 months
1 day=24
hours=24*(1*60mins)=24*60*(1*60 seconds)
1 week =7 days
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