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Amazon Interview Question for SDE1s


Country: United States
More Questions from This Interview



Comment hidden because of low score. Click to expand.
2
of 2 vote

"Materialized View(MV)" is different from "View(V)" for below reasons: 1) MV is stored on disk 2) The reason MV is stored on disk is to reduce the computation time i.e. in data warehousing environments we use aggregated or summary tables, these summary/aggregate tables are created before hand in the form of MV and stored on disk. 3) Materialized view is a name in oracle environment and in sql server it is known by indexed views.

- AD February 24, 2014 | Flag Reply
Comment hidden because of low score. Click to expand.
1
of 1 vote

Materialized view is disk based and are updated periodically.
Views are virtual and the underlying query is executed everytime the view is accesed.

- Subhajit April 30, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

Materialized view is a Cached View basically used for fast data access.

- hprem991 April 19, 2013 | Flag Reply
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0
of 0 vote

Materialized view is the result set of a query

View is thought of as a virtual table, that is, a table that does not really exist in its own right but is instead derived from one or more underlying base table.

- Preethi June 04, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

View shows underlying table data changes in real time and Materialized view is a snap shot and needs to be updated periodically.

Materialized view is a way of denormalizing data to avoid repetitive expensive joins .

- pat August 08, 2013 | Flag Reply


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