3-15记录

Oracle的初步了解：

select * from emp where empno = 10;

select empno,feptno from emp order byempno desc,deptno asc;

select sal 调前,case job when ‘PRESIDENT‘ then sal + 1000 when ‘MANAGER‘ then sal + 800  else sal + 400 end 涨后 from emp;

select sal ,decode(job,‘PRESIDENT‘,sal+ 1000,‘MANAGER‘,sal+800,sal+400) from emp;