What are the types of tables in Teradata

as far as i my knoweledge goes we have ,correct me if i am wrong. 1 SET 2 MULTI SET 3 GLOBAL TEMPORARY TABLES 4 TEMPORARY TABLES and there is one more i reckon which i cant remember.

What is the diffrence between Multiload & Fastload interms of Pe

Fastload is used to load empty tables and is very fast, can load one table at a time. Multiload can load at max 5 tbls at a time and can also update and delete the data. Fastload can be used only for inserting data, not updating and deleting

How does indexing improve query performance?

By creating index on single or multiple columns, query takes index access path instead of full table scan. Full table scan is costilier operation where it has to visit all rows in the table whereas index operation just accesses the index sub

Explain about Skew Factor?

The Table is having too many Duplicate rows, The Skew table will hadle the duplicate rows up to limitations,Once its cross the no of Rows it will effect on Performence.The Dba people will the SKEW tables. I think this Answer helps u

what is the difference between start schma and Fsldm?

A star schema has one Fact tables and many dimensional tables to store the related. FSLDM (Financial services logical data model) is a model proposed and designed by NCR to cater the needs of financial sectors, specially the Banking domain.

What is Join Index in TD and How it works?

JOIN INDEX: ----------- Join Index is nothing but pre-joining 2 or more tables or views which are commonly joined in order to reduce the joining overhead. So teradata uses the join index instead of resolving the joins in the participating bas

What is the process to restart the multiload if it fails?

MULTILOAD will creates 2 error tables, 1 work table When MULTILOAD fails We have to unlock the Main Table, here error tables and work tables are not locked like FLOAD To Unlock the Main Table in Mload RELEASE MLOAD ;

What are two examples of an OLTP environment?

On Line Banking On Line Reservation(Transportation like Rail, Air etc.)

How can we build data marts from FSLDM. is there any standard approa

In teradata, we can create another database which will contain all the views for a given subject area. These views togeather will form a logical datamart for that set of business users.

Does SDLC changes when you use Teradata instead of Oracle?

SDLC doesn't change but physical data model changes. Physical data model(i.e table structure) needs to be re- designed according to the teradata database.

Write a single SQL to delete duplicate records from the a single tab

One need have atleast a unique column such as timestamp col (and assumption is to keep lowest tmpstmp) OR some key col say IPID (again keep lowest value).. One determined - Have a nested Select on all rows (except that key col) with group b

What is FILLER command in Teradata?

ok Girish, can u send the SYNTAX for Filler command

What is a common data source for the central enterprise data warehou

operational data stores (ODS)

IS IT POSSIBLE THAT THERE R TWO PRIMARY KEY WILL BE IN A SAME TABLE?

Absolutly No. One table can not have more than one PK. But u can have 2 cols as 1 PK called Composite Primary Key.

In which phase of the Active Data Warehouse evolution do you use dat

In predicting phase. Analysts utilize the system to leverage information to predict what will happen next in the business to proactively manage the organization's strategy.

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