oracle 상용 명령 과 함수

select * from v$version;

SPOOL report
@run_report --          SPOOL report.txt
SPOOL OFF

select * from v$NLS_PARAMETERS;

SELECT supplier_name, 
decode(supplier_id, 10000, 'IBM', 
    10001, 'Microsoft', 
    10002, 'Hewlett Packard', 
    'Gateway') result 
FROM suppliers;

IF supplier_id = 10000 THEN
    result := 'IBM';
ELSIF supplier_id = 10001 THEN
    result := 'Microsoft';
ELSIF supplier_id = 10002 THEN
    result := 'Hewlett Packard';
ELSE
    result := 'Gateway';
END IF;

select decode(a.count,1,3) from (select count(*) as count from dual) a;

select mod(2,4) from dual;

nvl(expre1,expre2)

select case( empno as varchar2(20) ) e from eoda.emp;