معلومات هامة عن التواريخ ......

If we want a list for the employee that have started the work in 1985 then we type the following order :

Select ename , hiredate 
From emp Where to_char (hiredate,'yyyy') = 1985 ;

And if we want them they have started working in the third month and in the year 1985 the we use the folloeing :

Select ename , hiredate
From emp Where to_char(hiredate , 'yyyy') = 1985 And to_char(hiredate,'mm')  = 03 ;

You can here see all employess and hiredate in day and month and in years .

Select initcap(ename), hiredate ,
Trunc((sysdate-hiredate)/365,0) years ,
Trunc(mod((sysdate-hiredate),365)/30,0) Months ,
Trunc(mod(mod((sysdate-hiredate),365),30),0) Days
from emp ;

thank you very much for all .................