한 페이지에,총 20개의 데이터가,왼쪽 다단에 10개,오른쪽 다단에 10개가 표시되는 SELECT SQL SELECT MAX(DECODE(LR, 0, RN)) AS L , MAX(DECODE(LR, 1, RN)) AS R FROM ( SELECT RN AS RN , RN - (FLOOR((RN + 10 -1) / 20) * 10) AS PRN , MOD(FLOOR((RN - 1) / 10), 2) AS LR FROM ( SELECT LEVEL AS RN ..