Answer / sindhu

View - store the SQL statement in the database and let you
use it as a table. Every time you access the view, the SQL
statement executes.
Materialized view - stores the results of the SQL in table
form in the database. SQL statement only executes once and
after that every time you run the query, the stored result
set is used. Pros include quick query results

Answer / anju

materialized view can be used to precalculate the expensive
joins and aggregates prior to execution and the result is
stored in a table in database and can refer to it in
future. the adv of this is increse in performance.
view is nothing but an sql query stored. it will not store
data in tables

Answer / atiric sofrware(raja)

Views contains query whenever execute views it has read from
base table
Where as Materialised views loading or replicated takes
place only once which gives you better query performance

Refresh materialised views
1.on commit
2. on demand
(Complete, never, fast, force)

Answer / praveen kumar pendekanti

In view if we do any operation that may be changes in table
and viveversa.View dont have memery allocation.if we create
a view as 'v1' on emp table and then we delete the emp
table there by 'v1' name will be exist in view list, but
data will not be there, if we create the emp table once
again it will automatically link to that 'v1'view.

But in the case of M.views the changes that made in table
cannot be seen in M.view.M.views have separate memery
allocation if we delete the table the M.view will be there.
M.view is read only view,D.D.L oerations are not possible
on this M.view. M.view are used in dataware housing.

Describe the scenarios where we go for joiner transformation instead of source qualifier transformation?

0 Answers  

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without table how to come first record only in oracle?

0 Answers  

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i have a session which creates a file every time when i runs the session, but it replaces the first file with second file,i want to append the second file follwed by first file when i runs the session,how to achieve this?

1 Answers   Thomson Reuters,

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What happens if we dont select data driven option?

2 Answers   Zensar,

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source : xml file target: xml file how can we check data loaded into target xml file using writing sql query. pls help on this asap.

0 Answers   Cap Gemini, Cognizant,

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How do you load first and last records into target table?

0 Answers  

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in unconnected lookup , what are the other transformations , that can be used in place of that expression transformation ?

9 Answers   Target,

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tell me 7.x and 8.x diferrencess(but not transformations)

1 Answers  

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There are 4 flat files with number of records as indicated below. Which files should be picked first for joining using joiners so as to get best performance. File A - 1000 records File B - 100 records File c - 10000 records File D - 10 records Please explain. Thanks and Regards,

1 Answers   Amdocs,

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Can you copy the batches?

3 Answers  

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I have source table 100 records after run session successfully but loads the target table 50 records only what happened that 50 records and how can i load remaining 50 records

5 Answers   Patni,

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I have 1 crore record in my table and I have to load 25 L in 1st target,25L in 2nd target and 25L in 3rd target? I am new to Informatica,can anybody suggest me the idea?

2 Answers  

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