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net start oracleOraDb10g_home1iSQL*Plus
net start oracleOraDb10g_home1TNSListener
net start oracleServiceORCL
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net stop oracleOraDb10g_home1iSQL*Plus
net stop oracleOraDb10g_home1TNSListener
net stop oracleServiceORCL
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select *from emp where
sal>(select sal from emp where name="SMITH");
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select e1.ename,e2.ename from
emp e1,emp e2 where e1.mgr=e2.empno(+);
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