Question

我有一个INSERT INTO触发器，我希望SELECT部分评估一个字段的值（RDO），并根据RDO的“休息日”值与分配给该日期的DAYNAME相比较，将一个值返回给SchedStatus。家长时间表。时间表本身是在php文档的while循环中创建的（效果很好）。以下是我两次评估RDO值的尝试：

INSERT INTO sched_personnel (Sched_Shift_ID, UnitNumber, SupervisorNumber, Rank, Lunch, Assignment, Shift, Squad, RDOs, SchedStatus)  
      SELECT NEW.Sched_Shift_ID, UnitNumber, SupervisorNumber, Rank, Lunch, Assignment, Shift, Squad, RDO, @SchedStatus
      CASE
        WHEN RDO = 'SAT/SUN' AND (DAYNAME(NEW.ShiftDate) = 'Saturday' OR DAYNAME(NEW.ShiftDate) ='Sunday') THEN 'OFF'
        WHEN RDO = 'SUN/MON' AND (DAYNAME(NEW.ShiftDate) = 'Sunday' OR DAYNAME(NEW.ShiftDate) ='Monday') THEN 'OFF'
        WHEN RDO = 'MON/TUE' AND (DAYNAME(NEW.ShiftDate) = 'Monday' OR DAYNAME(NEW.ShiftDate) ='Tuesday') THEN 'OFF'
        WHEN RDO = 'TUE/WED' AND (DAYNAME(NEW.ShiftDate) = 'Tuesday' OR DAYNAME(NEW.ShiftDate) ='Wednesday') THEN 'OFF'
        WHEN RDO = 'WED/THU' AND (DAYNAME(NEW.ShiftDate) = 'Wednesday' OR DAYNAME(NEW.ShiftDate) ='Thursday') THEN 'OFF'
        WHEN RDO = 'THU/FRI' AND (DAYNAME(NEW.ShiftDate) = 'Thursday' OR DAYNAME(NEW.ShiftDate) ='Friday') THEN 'OFF'
        WHEN RDO = 'FRI/SAT' AND (DAYNAME(NEW.ShiftDate) = 'Friday' OR DAYNAME(NEW.ShiftDate) ='Saturday') THEN 'OFF'
        ELSE 'ONS'
      END AS @SchedStatus
      FROM accounts 
      WHERE accounts.Shift = NEW.Shift AND accounts.AccountStatus = 'Active';

我也尝试过：

INSERT INTO sched_personnel (Sched_Shift_ID, UnitNumber, SupervisorNumber, Rank, Lunch, Assignment, Shift, Squad, RDOs, SchedStatus)  
      SELECT NEW.Sched_Shift_ID, UnitNumber, SupervisorNumber, Rank, Lunch, Assignment, Shift, Squad, RDO, @SchedStatus
      CASE
        WHEN RDO = 'SAT/SUN' AND DAYNAME(NEW.ShiftDate) IN ('Saturday', 'Sunday') THEN 'OFF'
        WHEN RDO = 'SUN/MON' AND DAYNAME(NEW.ShiftDate) IN ('Sunday', 'Monday') THEN 'OFF'
        WHEN RDO = 'MON/TUE' AND DAYNAME(NEW.ShiftDate) IN ('Monday', 'Tuesday') THEN 'OFF'
        WHEN RDO = 'TUE/WED' AND DAYNAME(NEW.ShiftDate) IN ('Tuesday', 'Wednesday') THEN 'OFF'
        WHEN RDO = 'WED/THU' AND DAYNAME(NEW.ShiftDate) IN ('Wednesday', 'Thursday') THEN 'OFF'
        WHEN RDO = 'THU/FRI' AND DAYNAME(NEW.ShiftDate) IN ('Thursday', 'Friday') THEN 'OFF'
        WHEN RDO = 'FRI/SAT' AND DAYNAME(NEW.ShiftDate) IN ('Friday', 'Saturday') THEN 'OFF'
        ELSE 'ONS'
      END AS @SchedStatus
      FROM accounts 
      WHERE accounts.Shift = NEW.Shift AND accounts.AccountStatus = 'Active';

我收到一个错误：

SQL错误（1064）：您的SQL语法有错误；检查与您的MySQL服务器版本相对应的手册以获取正确的语法，以在第4行的“ CASE WHEN RDO ='SAT / SUN'AND DAY NAME（NEW.Shift Date）IN（'Saturday'，'Sunday'）'附近使用。

如果消除查询的CASE部分，则将子记录添加到无误创建的每个父记录中。期望的最终状态是插入的每个子记录（sched_perssonel）都有一个“ SchedStatus”，该记录对应于个人的默认RDO，因此，CASE会比较该RDO与计划的日期（tabel sched_shift）进行评估。在正确的情况下我无法获取邮件。

谢谢您的帮助。

Answer 1

我发现了3个错误

1）在您的代码中，有10列要插入，而11则在选择..

2）您的代码中有

  ...,   @SchedStatus

  CASE
    WHEN RDO = 'SAT/SUN' .......

您错过了@SchedStatus和CASE之间的逗号
但是向您寻找代码..我认为您不需要@schedStatus并且我已删除

3）您在CASE末尾有一个别名@schedStatus ...但是使用insert select不需要别名

INSERT INTO sched_personnel (Sched_Shift_ID, UnitNumber, SupervisorNumber, Rank, Lunch, Assignment, Shift, Squad, RDOs, SchedStatus)  
    SELECT NEW.Sched_Shift_ID
      , UnitNumber
      , SupervisorNumber
      , Rank
      , Lunch
      , Assignment
      , Shift
      , Squad
      , RDO
      , CASE
      WHEN RDO = 'SAT/SUN' AND (DAYNAME(NEW.ShiftDate) = 'Saturday' OR DAYNAME(NEW.ShiftDate) ='Sunday') THEN 'OFF'
      WHEN RDO = 'SUN/MON' AND (DAYNAME(NEW.ShiftDate) = 'Sunday' OR DAYNAME(NEW.ShiftDate) ='Monday') THEN 'OFF'
      WHEN RDO = 'MON/TUE' AND (DAYNAME(NEW.ShiftDate) = 'Monday' OR DAYNAME(NEW.ShiftDate) ='Tuesday') THEN 'OFF'
      WHEN RDO = 'TUE/WED' AND (DAYNAME(NEW.ShiftDate) = 'Tuesday' OR DAYNAME(NEW.ShiftDate) ='Wednesday') THEN 'OFF'
      WHEN RDO = 'WED/THU' AND (DAYNAME(NEW.ShiftDate) = 'Wednesday' OR DAYNAME(NEW.ShiftDate) ='Thursday') THEN 'OFF'
      WHEN RDO = 'THU/FRI' AND (DAYNAME(NEW.ShiftDate) = 'Thursday' OR DAYNAME(NEW.ShiftDate) ='Friday') THEN 'OFF'
      WHEN RDO = 'FRI/SAT' AND (DAYNAME(NEW.ShiftDate) = 'Friday' OR DAYNAME(NEW.ShiftDate) ='Saturday') THEN 'OFF'
      ELSE 'ONS'
    END A
    FROM accounts 
    WHERE accounts.Shift = NEW.Shift AND accounts.AccountStatus = 'Active';

MySQL插入到带有CASE WHEN的选择查询中

1 个答案: