触发输入新记录答案

【问题标题】：Trigger to enter new record触发输入新记录
【发布时间】：2018-10-24 16:45:31
【问题描述】：

我有一个 sql 在员工合同到期前 60 天在通知表中插入记录。

         INSERT INTO notification (name)
    SELECT employee.employee_name
    from EMPLOYEE, employee_info 
    where EMPLOYEE_INFO.EMPLOYEE_NAME(+) =EMPLOYEE.EMPLOYEE_NAME             

AND (LEAVE_TYPE ='Vacation'
             or LEAVE_TYPE = 'Personal')
     group by  EMPLOYEE.EMPLOYEE_NAME, EMPLOYEE.CONTRACT_END_PERIOD, EMPLOYEE.TOTAL_VACATION_LEAVE, EMPLOYEE_INFO.LEAVE_TYPE
      HAVING sum(days_taken) > 0
     and TO_DATE(contract_end_period,'DD-MM-YYYY') < TO_DATE (SYSDATE,'DD-MM-YYYY') + 60
);

但是，当新员工合同到期时，我只想将新记录插入到通知表中。

我目前得到的是新旧条目的插入（因为我使用的是页面加载 sql），这会导致表中出现重复。

【问题讨论】：

标签： oracle oracle11g oracle-apex

【解决方案1】：

INSERT INTO notification (name)
    SELECT employee.employee_name
    from EMPLOYEE, employee_info 
    where EMPLOYEE_INFO.EMPLOYEE_NAME(+) =EMPLOYEE.EMPLOYEE_NAME             
    AND (LEAVE_TYPE ='Vacation' or LEAVE_TYPE = 'Personal')
 -> AND employee.employee_name NOT IN (select notification.name from notification) <-
     group by  EMPLOYEE.EMPLOYEE_NAME, EMPLOYEE.CONTRACT_END_PERIOD, EMPLOYEE.TOTAL_VACATION_LEAVE, EMPLOYEE_INFO.LEAVE_TYPE
      HAVING sum(days_taken) > 0
     and TO_DATE(contract_end_period,'DD-MM-YYYY') < TO_DATE (SYSDATE,'DD-MM-YYYY') + 60
);

您需要将查询限制为该表中尚不存在的人。上面给出了一个例子："-> AND employee.employee_name NOT IN (select notification.name from notification) 标记。

【讨论】：