Unit 4 scd2-exercise 1-solution
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This document outlines an exercise involving Slowly Changing Dimensions (SCD) Type 2 using SQL commands. It includes steps for creating tables, inserting data, updating records, and managing historical data along with transformations. The exercise is designed to teach users how to manage and track changes in dimensional data using Pentaho Spoon.
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Unit 4 scd2-exercise 1-solution
- 1. Unit 4 SLOWLY CHANGIN DIMENSION 2 – Exercise -1 Solution (SCD2) https://www.oercommons.org/authoring/28550-etl-using-pentaho-spoon https://www.oercommons.org/authoring/28693-etl-using-pentaho-spoon-lecture-notes-ppt-exercise Dr. Girija Narasimhan 1
- 2. Exercise: Create table employ2(eid number(5),ename varchar2(15),salary number(5)); insert into employ2 values(1001,'Alaa',1800); insert into employ2 values(1002,'Ravi',1500); select * from employ2; create table emp_dim_scd2(emp_sur_key number(5),date_from date,date_to date,version number(6),dim_eid number(5),ename varchar2(15),salary number(5)); update employ2 set salary=2500 where eid=1001; select * from emp_dim_scd2; insert into employ2 values(1003,'Suha',1900); Dr. Girija Narasimhan 2
- 3. Dr. Girija Narasimhan 3 Create employ2 table and emp_dim_scd2 table
- 4. Dr. Girija Narasimhan 4 Drag and include “Table Input”
- 5. Connect the table employ2 table and preview the data Dr. Girija Narasimhan 5
- 6. Drag and include dimension lookup/update connect table input with dimension lookup/update Dr. Girija Narasimhan 6
- 7. Connect the database Dr. Girija Narasimhan 7
- 8. Dr. Girija Narasimhan 8 Key field surrogate key Date from Date to
- 9. Select Fields Dr. Girija Narasimhan 9
- 10. Update the eid=1001 salary as 2500 in employ2 table Dr. Girija Narasimhan 10
- 11. Execute the transformation Dr. Girija Narasimhan 11
- 12. Preview data and updated record information Dr. Girija Narasimhan 12
- 13. Check the emp_dim_scd1 table records updated history Dr. Girija Narasimhan 13
- 14. Insert new record Dr. Girija Narasimhan 14
- 15. Execute the transformation Dr. Girija Narasimhan 15
- 16. Dr. Girija Narasimhan 16 Preview the data and newly inserted record information
- 17. Dr. Girija Narasimhan 17