Skip to main content

Types of Fact Tables in Datawarehouse

By

There are 3 types of fact tables in data warehouse

1. Transactional 

2. Periodic Snapshot

3. Accumulating  snapshot


Transactional Fact Table: 

1. Transactional fact table will be in detailed level.

2. It will have each line of transaction. Example: each line of sale and invoice.

3. Transactional fact table has so detailed level data, so it will be have all the dimensional assisted with it



Periodic Snapshot Fact table:

1. Periodic snapshot fact table will have information by time to time.

2. Consider you want  the information of growth of sales  information of an organisation for a particular region last month compare to this month. Then you will need  periodic snapshot fact table.

3. Periodic snapshot fact table will depend upon transactional fact table as it need a detail held in transactional fact table related to region sales of an organisation.


Accumulating  snapshot Fact table:

1. Accumaulating snapshot fact table is used to show the information of the business which has cleary defined from begin to the end.

2. If you see a purschase order of an organisation, The purschase will move in specific order unstill it is fully processed.

3. Accumlating snapshot fact table will have multiple date column, each date column represent the level of purshase status of an organisation.
How you will define the fact table?

 1. Identify the business process of an orginaization

2. Define the grain

 3. choose the dimensional for your fact table

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Contact Me

By
Do You have any queries ?                   If you are having any query or wishing to get any type of help related Datawarehouse, OBIEE, OBIA, OAC then please e-email on below. I will reply to your email within 24 hrs. If I didn’t reply to you within 24 Hrs., Please be patience, I must be busy in some work. kashif7222@gmail.com
3 comments
Read more

Top 100 Informatica Interview Questions

By
I have attended Informatica interview last week in wipro and couple of other companies, Question below I faced in those companies. 1. What are the main issues while working with flat files as source and as targets ? 2. Explain about Informatica server process that how it works relates to mapping variables? 3. write a query to retrieve the latest records from the table sorted by version(scd) 4. How do you handle two sessions in Informatica 5. which one is better performance wise joiner or look up 6. How to partition the Session? 7. How many types of sessions are there in informatica.please explain them. 8. Explain the pipeline partition with real time example? 9. Explain about cumulative Sum or moving sum? 10. CONVERT MULTIPLE ROWS TO SINGLE ROW (MULTIPLE COLUMNS) IN INFORMATICA 11. DEPLOYMENT GROUPS IN INFORMATICA 12. LOAD LAST N RECORDS OF FILE INTO TARGET TABLE - INFORMATICA 13. LOAD ALTERNATIVE RECORDS / ROWS INTO...
129 comments
Read more

Top 130 SQL Interview Questions And Answers

By
1. Display the dept information from department table.   Select   *   from   dept; 2. Display the details of all employees   Select * from emp; 3. Display the name and job for all employees    Select ename ,job from emp; 4. Display name and salary for all employees.   Select ename   , sal   from emp;   5. Display employee number and total salary   for each employee. Select empno, sal+comm from emp; 6. Display employee name and annual salary for all employees.   Select empno,empname,12*sal+nvl(comm,0) annualsal from emp; 7. Display the names of all employees who are working in department number 10   Select ename from emp where deptno=10; 8. Display the names of all employees working as   clerks and drawing a salary more than 3000   Select ename from emp where job=’clerk’and sal>3000; 9. Display employee number and names for employees who earn commissi...
32 comments
Read more