sql 在示例上显示布尔表达式。检查日期是否过去

Posted 2021-05-14

DECLARE
  hiredate date := SYSDATE +3;
  date_in_past BOOLEAN;
BEGIN
    date_in_past :=  NVL (hiredate < SYSDATE, FALSE);
    DBMS_OUTPUT.put_line(
        case date_in_past
            when TRUE then  'TRUE'
            when FALSE then 'FALES'
        END    
    );
END;