calculate fraction by oracle

QUESTION:When you meet calculate fraction in oracle

SOLUTION:

1.Check out their values respectively. the use sign of division.

select  count(1) from emp where empno=7369;

select count(1) from emp ;

2.Fusion use  a command by dual table.

select  (select count(1) from emp where empno=7369)/(select count(1) from emp)  from dual;

calculate fraction by oracle

原文：http://www.cnblogs.com/yjhlsbnf/p/7828373.html