mysql 날짜함수 정리 SELECT NOW() as 'now날짜시간' ,DATE_FORMAT(NOW(),'%Y%m%d') as 'yyyymmdd' ,DATE_FORMAT(NOW(),'%H%i%s') as 'hh24miss' ,DATE_FORMAT(NOW(),'%p %h:%i:%s') as 'AM/PM hh:mi:ss' ,CURRENT_TIMESTAMP as 'C_T날짜시간' ,DATE_FORMAT(CURRENT_TIMESTAMP,'%Y%m%d') as 'C_Tyyyymmdd' ,DATE_FORMAT(CURRENT_TIMESTAMP,'%H%i%s') as 'C_Thh24miss' ,DATE_FORMAT(CURRENT_TI..