ORACLE 一些函数

select replace(decode('12',0,'0.00',to_char(12,9999999999.99)),' ','') from dual;

select * from(

select * from t_user_login_log where to_date(LOGIN_TIME,'yyyy.mm.dd hh24.mi.ss') between (sysdate-1/24) and sysdate order by LOGIN_TIME desc

) where rownum in(1,2,3);



select to_char(12,'9999999.9') from dual;

select to_char(12,'9999999999.99') from dual;

select replace('a b c',' ','') from dual;

select lpad('tech', 7,0) from dual;

select rpad('tech', 7,0) from dual;