sql - 如何获取不同生效日期的员工详细信息？

Question

请看以下图片。它本质上是我的数据库的样子。

BI_EMPLOYEE 表始终具有今天的当前记录。虽然它可能从以前的某个日期开始生效。

例如，如图所示的员工 Anna 从 3 月 31 日开始加入，直到今天没有对该员工进行任何更新。

因此，BI_EMPLOYEE 的生效日期 = 2012 年 3 月 31 日。

但是，稍后可能会在现在知道的未来日期对员工进行调整。

例如，安娜将于 5 月 10 日从亚洲搬到我们这里，以此类推。因此，从 5 月 10 日起，她所在的地区将是我们。

因此，我需要一份报告，其中将列出所有员工在每个生效日期的状态。基本上，所有员工在不同日期的所有活动和更新。

我们还安排了每天运行所有更新和活动的计划，即从更新和活动表中对 BI_EMPLOYEE TABLE 进行更改。

因此，5 月 10 日的时间表将把地区从亚洲改为我们。

我还附上了具有预期结果的图像。

我们正在使用 Oracle 数据库。

请帮忙。

我基本上需要创建一个视图，该视图将提供所需的输出，然后可以随时查询任何报告。

编辑1：

以下是 DDL 和 DML

        --------------------------------------------------------
    --  DDL for Table BI_REGION
    --------------------------------------------------------
     CREATE TABLE "BI_REGION" 
       (    "REGION_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "REGION_NAME" VARCHAR2(4000) NOT NULL ENABLE
       ) ;
    --------------------------------------------------------
    --   DATA FOR TABLE BI_REGION
    --------------------------------------------------------
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (1,'Asia');
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (2,'US');
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (3,'UK');
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (4,'Germany');
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (5,'EUROPE');
    Insert into BI_REGION (REGION_ID,REGION_NAME) values (6,'AUSTRALIA');

    -------------------------------------------------------
    --  DDL for Table BI_COUNTRY
    --------------------------------------------------------
      CREATE TABLE "BI_COUNTRY" 
       (    "COUNTRY_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "COUNTRY_NAME" VARCHAR2(4000) NOT NULL ENABLE 
       ) ;

    --   DATA FOR TABLE BI_COUNTRY
    --   FILTER = none used
    ---------------------------------------------------
    REM INSERTING into BI_COUNTRY
    Insert into BI_COUNTRY (COUNTRY_ID,COUNTRY_NAME) values (1,'India');
    Insert into BI_COUNTRY (COUNTRY_ID,COUNTRY_NAME) values (2,'USA');
    Insert into BI_COUNTRY (COUNTRY_ID,COUNTRY_NAME) values (3,'England');
    Insert into BI_COUNTRY (COUNTRY_ID,COUNTRY_NAME) values (4,'Germany');
    Insert into BI_COUNTRY (COUNTRY_ID,COUNTRY_NAME) values (5,'New Zealnd');

    --------------------------------------------------------
    --  DDL for Table BI_DIVISION
    --------------------------------------------------------
      CREATE TABLE "BI_DIVISION" 
       (    "DIVISION_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "DIVISION_NAME" VARCHAR2(4000) 
       ) ;

    ---------------------------------------------------
    --   DATA FOR TABLE BI_DIVISION
    --   FILTER = none used
    ---------------------------------------------------

    Insert into BI_DIVISION (DIVISION_ID,DIVISION_NAME) values (1,'D1');
    Insert into BI_DIVISION (DIVISION_ID,DIVISION_NAME) values (2,'D2');


    --------------------------------------------------------
    --  DDL for Table BI_PRODUCT
    --------------------------------------------------------
      CREATE TABLE "BI_PRODUCT" 
       (    "PRODUCT_NAME" VARCHAR2(4000), 
        "PRODUCT_ID" NUMBER(*,0) NOT NULL ENABLE 
       ) ;

    ---------------------------------------------------
    --   DATA FOR TABLE BI_PRODUCT
    --   FILTER = none used
    ---------------------------------------------------
    REM INSERTING into BI_PRODUCT
    Insert into BI_PRODUCT (PRODUCT_NAME,PRODUCT_ID) values ('P1','1');
    Insert into BI_PRODUCT (PRODUCT_NAME,PRODUCT_ID) values ('P2','2');


    --------------------------------------------------------
    --  DDL for Table BI_EMPLOYEE_ACTIVITY
    --------------------------------------------------------
      CREATE TABLE "BI_EMPLOYEE_ACTIVITY" 
       (    "ACTIVITY_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "STATUS" NUMBER(*,0), 
        "STATUS_2" NUMBER(*,0),     
        "STATUS_3" VARCHAR2(4000), 
        "CONFIDENTIAL" VARCHAR2(1 CHAR) DEFAULT 'N', 
        "EFFECTIVE_DATE" DATE, 
        "PARENT_ACTIVITY_ID" NUMBER(*,0), 
        "EXECUTED" VARCHAR2(1 CHAR) DEFAULT 'N', 
        "EMPLOYEE_ID" NUMBER 
       ) ;



    ---------------------------------------------------
    --   DATA FOR TABLE BI_EMPLOYEE_ACTIVITY
    --   FILTER = none used
    ---------------------------------------------------

    REM INSERTING into BI_EMPLOYEE_ACTIVITY
    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (1,1,'Leaver','Intra Region','','No','10-May-2012',0);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (2,1,'Joiner','Intra Region','','No','10-May-2012',1);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (3,1,'Leaver','Intra Region','','No','10-June-2012',0);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (4,1, 'Joiner','Intra Region','','No','10-June-2012',3);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (5,1,'Leaver','Intra Region','','No','10-July-2012',0);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (6,1, 'Joiner','Intra Region','','No','10-July-2012',5);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (7,1,'Leaver','Intra Business','','No','10-Aug-2012',0);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (8,1, 'Joiner','Intra Business','','No','10-Aug-2012',7);

    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (9,1,'Leaver','Intra Business','','No','10-Sep-2012',0);


    Insert into BI_EMPLOYEE_ACTIVITY (ACTIVITY_ID,EMPLOYEE_ID, STATUS,STATUS_2,STATUS_3,CONFIDENTIAL,EFFECTIVE_DATE,PARENT_ACTIVITY_ID,) 
    values (10,1, 'Joiner','Intra Business','','No','10-Sep-2012',9);




    --------------------------------------------------------
    --  DDL for Table BI_EMPLOYEE
    --------------------------------------------------------
      CREATE TABLE "BI_EMPLOYEE" 
       (    "EMP_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "FIRSTNAME" VARCHAR2(4000), 
        "LASTNAME" VARCHAR2(4000), 
        "DIVISION_ID" NUMBER(*,0), 
        "PRODUCT_ID" NUMBER(*,0), 
        "REGION_ID" NUMBER(*,0), 
        "COUNTRY_ID" NUMBER(*,0), 
        "CITY" VARCHAR2(4000) ,
        "EFFECTIVE_DATE" DATE
       ) ;

    ---------------------------------------------------
    --   DATA FOR TABLE BI_EMPLOYEE
    --   FILTER = none used
    ---------------------------------------------------
    Insert into BI_EMPLOYEE (EMP_ID,FIRSTNAME,LASTNAME,DIVISION_ID,PRODUCT_ID,REGION_ID,COUNTRY_ID,EFFECTIVE_DATE,CITY) values (1,'Ana','Johnston',1,1,1,1,'31-March-2012','Mumbai');


    --------------------------------------------------------
    --  DDL for Table BI_EMPLOYEE_UPDATE
    --------------------------------------------------------
      CREATE TABLE "BI_EMPLOYEE_UPDATE" 
       (    "EMPLOYEE_UPDATE_ID" NUMBER(*,0) NOT NULL ENABLE, 
        "EMPLOYEE_ID" NUMBER(*,0), 
        "COLUMN_NAME" VARCHAR2(4000), 
        "OLD_VALUE" VARCHAR2(4000), 
        "NEW_VALUE" VARCHAR2(4000), 
        "EFFECTIVE_DATE" DATE, 
        "EXECUTED" VARCHAR2(1 CHAR) DEFAULT 'N', 
        "ACTIVITY_ID" NUMBER 
       ) ;


    ---------------------------------------------------
    --   DATA FOR TABLE BI_EMPLOYEE_UPDATE
    --   FILTER = none used
    ---------------------------------------------------
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'REGION_ID','1','2','10-May-2012', 'N', 1);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'COUNTRY_ID','1','2','10-May-2012', 'N', 1);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'CITY','Mumbai','New York','10-May-2012', 'N', 1);

    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'REGION_ID','2','3','10-June-2012', 'N', 3);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'COUNTRY_ID','2','3','10-June-2012', 'N', 3);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'CITY','New York','London','10-June-2012', 'N', 3);

    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'REGION_ID','3','4','10-July-2012', 'N', 5);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'COUNTRY_ID','3','4','10-July-2012', 'N', 5);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'CITY','London','frankfurt','10-July-2012', 'N', 5);

    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'DIVISION_ID','1','2','10-Aug-2012', 'N', 7);
    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'Product_ID','1','2','10-Aug-2012', 'N', 7);

    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'PRODUCT_ID','2','3','10-Sep-2012', 'N', 9);


    Insert into BI_EMPLOYEE_UPDATE (EMPLOYEE_ID,COLUMN_NAME,OLD_VALUE,NEW_VALUE,EFFECTIVE_DATE,EXECUTED,ACTIVITY_ID)  values (1,'LASTNAME','Johnston','thomas','10-Nov-2012', 'N', 0);

好的

Answer 1

首先，更好的数据结构是在数据中有一个生效日期和结束日期。这样，您可以查看在任何给定日期哪个记录处于活动状态。

幸运的是，您可以使用以下查询在 Oracle 中获取结束日期：

select eu.*,
       (lead(effective_date, 1, '9999-01-01') over (partition by employee_id, column_name
                                      order by effective_date)) - 1) as end_date
from bi_employee_update

此查询使用“lead”分析函数查看下一个生效日期。然后它减去一天以获得当前记录的结束日期，当前记录的默认值为 01Jan9999。

使用此查询，您可以使用 between 子句在任何日期获取有关员工的信息：

select eu.*
from (select eu.*,
             (lead(effective_date, 1, '9999-01-01') over (partition by employee_id, column_name
                                      order by effective_date)) - 1) as end_date
      from bi_employee_update
     ) eu
where <date> between effective_date and end_date

你能从这里查询吗？