Monday, 25 March 2024

System Details using Oracle ( RDBMS )

select sysdate from dual;

select to_char(sysdate,'yyyy') from dual;

select to_char(sysdate,'yyy') from dual;

select to_char(sysdate,'yy') from dual;

select to_char(sysdate,'mm') from dual;

select to_char(sysdate,'mon') from dual;

select to_char(sysdate,'month') from dual;

select to_char(sysdate,'q') from dual;

select to_char(sysdate,'rm') from dual;

select to_char(sysdate,'dd') from dual;

select to_char(sysdate,'ddd') from dual;

select to_char(sysdate,'d') from dual;

select to_char(sysdate,'day') from dual;

select to_char(sysdate,'dy') from dual;

select to_char(sysdate,'hh') from dual;

select to_char(sysdate,'hh24') from dual;

select to_char(sysdate,'mi') from dual;

select to_char(sysdate,'ss') from dual;

select to_char(sysdate,'dd/mm/yy') from dual;

select to_char(sysdate,'dd-mm-yy') from dual;


create table EMP1(eid number,ename varchar2(10),dob date);

desc EMP1;

insert into EMP1 values(7,'dhoni','07-JUL-1981');

select * from EMP1;

insert into EMP1 values(99,'sourav','08-JUL-1972');

insert into EMP1 values(45,'jyotibasu','08-JUL-1914');

select * from EMP1;


select ename,to_char(dob,'yyyy') from EMP1;

select ename,to_char(dob,'dd/mm/yy') from EMP1;


insert into EMP1 values(1,'arik',to_date('15/11/2003','dd/mm/yyyy'));

insert into EMP1 values(2,'pranjali',to_date('13/12/2003','dd/mm/yyyy'));

There is no UNIVERSAL PERFECT RULE !

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