Answer / alhad kulkarni

The question is Advantages and Disadvantages, not What is
Star or Snowflake.
Star Adv: Reduced Joins, Faster Query Operation.
Snow Adv: Distributed data, Easier to obtain fact-less data
e.g. Orders Shipped across one Quarter.

Star DisAdv: Bigger table sizes, Too many rows in Fact Table
Snow DisAdv: More number of joins, Slower Query operation,

Answer / ravi sadanand

Star Schema: It is fully denormalized schema.the diagram of
fact table with dimension tables resembles a star that's
why it is called star schema.All the dimensions will be in
2nd normal form.
Snow flow schema:In this all dimensions will be in
normalized form.that's why it is called normalized star
schema.For each attribut a seperate table will be
created.As there is a possibility for more number of
joins,obviously the performance will be degraded.

Answer / susanta karmakar

Star Schema: A star schema is a specialized design that
consists of multiple dimension tables, which describe
aspects of a business, and one fact table, which contains
the facts about the business.For example, if you have a
mail-order business selling books, some dimension tables are
customers, books, catalogs, and fiscal years. The fact table
contains information about the books that are ordered from
each catalog by each customer during the fiscal year.

Answer / hania

Star Schama : easy for users to understand, optimize navigation and more suitable for query processing, and works faster.

Disadvantages: Dimension table have greater rows, large fact table

Answer / krishna

in starschema the fact is denormalised ...all dimension
tables are normalise..there will be primary foreignkey
relation ship between fact and dimension tables.
for better perfomance we use starschema when compare to
snow flake schema ..where fact table and dimension tables
are normalised...for every dimension table tthere will be a
look table ..we have to dig from top to bottom in the
snowflake schema.

What is ThroughPut in Informatica, How it works, Where I can find this option to check ?

5 Answers   CTS,

---

I have 4 columns in a table say, name ,address, salary and city. So based on distinct city names, i need to combine the other data and send it to a flat file. Distinct city names can be 4 or 5 or 6. So it has to dynamically generate flat files(4 or 5 or 6) corresponding to the city names.

2 Answers  

---

can u any challenge your project?

0 Answers   HP,

---

Explain the code page compatibility?

0 Answers  

---

If i havee 3records in my source having same deptno like Deptid Deptno ------ ------ 101 10 201 10 301 10 and i am using router TR to loading these records into target.Then how many record'll be loaded into target???

5 Answers   Wipro,

---

---

i have two sources two flatfiles same structure one flatfile contain 100 million recs another flatfile contain 10 million recs i have to connect single target(performance oriented answer) what are the steps we have to do this scenario

4 Answers   Polaris,

---

Mine is Insurance Domain, So interviewer asked about terms like underwriting, disbursement amt, Reinsurance

0 Answers   TCS, Wipro,

---

how to remove staging area

1 Answers  

---

I have the input file as col1 col2 col3 3 2 1 7 6 8 I should get the output as col1 col2 col3 1 2 3 6 7 8 ....What is the logic to get this? Is there any transformation which sorts row wise ? If not how to sort the incoming records row wise?

5 Answers  

---

What is an aggregator transformation? it is active why cant it be passive explain?

3 Answers   HCL,

---

if the session continuous run what can we do. means shall we stop the session or abort session. what is the correct reasion. why this situation occurs

1 Answers  

---

Hi, I am working on informatia in a support role. We used stored procedures in informatica and other than that I never got a chance to work on PL/SQL,little on Unix scripts. But I heard people asking about PL/SQL alot. Can any one let me know how do we use PL/SQL with informatica and if required what is the knowledge that we need to have on PL/SQL? Please let me know in detail which would really help me alot in my career prospectus.

1 Answers   Accenture,

---