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D:\oracle\product\10.2.0\admin\adidb\scripts>dbca
2.Æô¶¯ºÍ¹Ø±ÕʵÀý
D:\oracle\product\10.2.0\admin\adidb\scripts>net start oracleserviceorcl
D:\oracle\product\10.2.0\admin\adidb\scripts>net stop oracleserviceorcl
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1> ÉèÖÃoracle_sid (set oracle_sid=orcl)
2> sqlplus / as sysdba ÒÔdbaµÄÉí·ÝµÇ¼
3> ²é¿´ÊµÀý״̬£º select status, instance_name from v$instance ;
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Update SQLS will lead dead lock exception. Because by default, it use optimistic lock but not pessimistic lock.
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Optimistic locking offers an elegant solution to the problems o ......
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SQL> create table idtable (id number,name varchar2(30));
Table created
SQL> insert into idtable values(10,'ab');
1 row inserted
SQL> insert into idtable values(10,'bc');
1 row inserted
SQL> insert ......
36.ADD_MONTHS
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¡¡¡¡SQL> select to_char(add_months(to_date(199912,yyyymm),2),yyyymm) from dual;
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¡¡¡¡SQL> select to_char(add_months(to_date(199912,yyyymm),-2),yyyymm) from dual;
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¡¡¡¡199910
¡¡¡¡37.LAST_DAY
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