需要创建 pl/sql 查询的帮助

Question

向大家问好！ 我想通过声明以下变量来创建 pl/sql 查询，例如：

:stay_id = (SELECT Stay_Id from MVStay where StayNumber = 'xxxx' AND StayState = 2);
-- get passage linked to the stay and is 'discharged'
:passage_id = (SELECT Passage_Id from MVStayWorkflow where Stay_Id = :stay_id and WorkflowAction = 31);

-- get current date
:now = to_char(sysdate, 'YYYYMMDD HH:MI:SS.FF')
-- get a new sequence number
:stay_workflow_id = (get it from the concerned table)

--insert ‘Admin discharged’ workflow step
if( passage_id is not NULL)
begin
  Insert into MVStayWorkflow (StayWorkflow_Id, Stay_Id, Passage_Id, User_Id, RespUnit_Id, Resource_Id,
  WorkflowAction, CurrentState, PreviousState, WorkflowTime, UserStamp, TimeStamp)
  values (:stay_workflow_id, :stay_id, :passage_id, 1, 0, 0, 11, 7, 7, :now, 1, :now)
end

问候 Mohammed

你好，Alex..

我使用了你的代码，但遇到了错误： 从命令中的第 3 行开始出错： 宣布 l_stay_id MVStay.Stay_Id%TYPE; l_passage_id MVStayWorkflow.Passage_Id%TYPE; l_stay_workflow_id MVStayWorkflow.Stay_Workflow_Id%TYPE; l_now MVSTAY.ENDDATETIME%TYPE； begin

/* 关闭stay，stay_number = '030074559' */ 选择 Stay_Id 进入 l_stay_id 来自 MVStay 其中住宿编号 = '030074559' 且保持状态 = 2；

/* get passage linked to the stay and is 'discharged' */
select Passage_Id into l_passage_id
from MVStayWorkflow
where Stay_Id = l_stay_id
and WorkflowAction = 31;

/* get current date types in MVStayWorkflow? */
l_now := to_char(sysdate, 'YYYYMMDD HH:MI:SS.FF');

/* get a new sequence number */
l_stay_workflow_id := 500000

/* insert ‘Admin discharged’ workflow step */
if passage_id is not NULL then
    insert into MVStayWorkflow (StayWorkflow_Id, Stay_Id, Passage_Id,
        User_Id, RespUnit_Id, Resource_Id, WorkflowAction, CurrentState,
        PreviousState, WorkflowTime, UserStamp, TimeStamp)
    values (l_stay_workflow_id, l_stay_id, l_passage_id,
        1, 0, 0, 11, 7, 7, l_now, 1, l_now);
end if;

结尾; 错误报告： ORA-06550: 第 27 行，第 5 列： PLS-00103：在期望以下其中一项时遇到符号“IF”：

• & = - + ; < //> at in 是 mod 余数不是 rem <>或 != 或 ~= >= <= <>和或喜欢像2 like4 likec || 之间多重集成员子多重集 符号“;”替换为“IF”继续。
• 00000 - “第 %s 行，第 %s 列：\n%s” *原因：通常是 PL/SQL 编译错误。 *行动：

Answer 1

问题似乎是您想学习 PL/SQL，而不是帮助查询。这里有数据类型的各种问题，但基本轮廓如下：

declare
    l_stay_id MVStay.Stay_Id%TYPE;
    l_passage_id MVStayWorkflow.Passage_Id%TYPE;
    l_stay_workflow_id MVStayWorkflow.Stay_Workflow_Id%TYPE;
    l_now varchar2(20); /* but why isn't this a date? */
begin
    select Stay_Id into l_stay_id
    from MVStay
    where StayNumber = 'xxxx' /* number or string? */
    and StayState = 2;

    /* get passage linked to the stay and is 'discharged' */
    select Passage_Id into l_passage_id
    from MVStayWorkflow
    where Stay_Id = l_stay_id
    and WorkflowAction = 31;

    /* get current date - really, why hold it as a string? what are the field
       types in MVStayWorkflow? */
    l_now := to_char(sysdate, 'YYYYMMDD HH:MI:SS.FF');

    /* get a new sequence number */
    l_stay_workflow_id := (get it from the concerned table)
    /* or, select ... into; or use a proper sequence for the insert? */

    /* insert ‘Admin discharged’ workflow step */
    if passage_id is not NULL then
        insert into MVStayWorkflow (StayWorkflow_Id, Stay_Id, Passage_Id,
            User_Id, RespUnit_Id, Resource_Id, WorkflowAction, CurrentState,
            PreviousState, WorkflowTime, UserStamp, TimeStamp)
        values (l_stay_workflow_id, l_stay_id, l_passage_id,
            1, 0, 0, 11, 7, 7, l_now, 1, l_now);
    end if;
end;

您需要了解每个部分在做什么，并阅读 SQL 和 PL/SQL 之间的差异...

Answer 2

在 Oracle 中，您使用 SELECT ... INTO ... 语法填充变量：

DECLARE v_workflow_id NUMBER;

BEGIN

  SELECT ct.workflow_id
    INTO v_workflow_id 
    FROM CONCERNED_TABLE ct;

  INSERT INTO MVSTAYWORKFLOW
    (StayWorkflow_Id, Stay_Id, Passage_Id, User_Id, RespUnit_Id, Resource_Id, WorkflowAction, CurrentState, PreviousState, WorkflowTime, UserStamp, TimeStamp)
    SELECT v_workflow_id, s.stay_id, smf.passage_id, 1, 0, 0, 11, 7, 7, TO_CHAR(SYSDATE, 'YYYYMMDD HH:MI:SS.FF'), 1, TO_CHAR(SYSDATE, 'YYYYMMDD HH:MI:SS.FF')
     FROM MVSTAY s
LEFT JOIN MVSTAYWORKFLOW smf ON smf.stay_id = s.stay_id
                          AND smf.workflowaction = 31
  WHERE smf.passage_id IS NOT NULL
    AND s.stayNumber = 'xxxx' 
    AND s.staystate = 2;

END;

此外，Oracle 将以冒号（“:”）为前缀的文本解释为 BIND 变量，这意味着它应该是用传入参数值填充。

如果您希望将stay_id 与我提供的分开，请使用：

DECLARE your_variable_name MYSTAY.stay_id%TYPE;

SELECT s.stay_id 
  INTO your_variable_name
  FROM MVSTAY s 
 WHERE s.stayNumber = 'xxxx' 
   AND s.staystate = 2;