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Whatis the difference between View and Materialized View ?
- 11 Answers
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Answer / harshakore
A view has a logical existence but a materialized view has
a physical existence.Moreover a materialized view can be
indexed,analysed and so on....that is all the things that
we can do with a table can also be done with a materialized
view.
| Is This Answer Correct ? | 110 Yes | 5 No |
Answer / senthil
hi,
we already know basic restrictions of view and materialized
view,
view is a logical or virtual table it doesn't have data on
its own, but materialized view has a physical structure it
stores data in local machine or on its own.materialized view
can be refreshed automatically or manually. but in view, if
any changes happened in the base tables, we want to reflect
the same in the view means view has to issue the select
statement again to the database
| Is This Answer Correct ? | 71 Yes | 6 No |
Answer / anju
A materialized view is a stored summary containing pre-
computed results.As the data is pre-computed, materialized
views allow for faster query answers
In warehousing applications, large amounts of data are
processed and similar queries are frequently repeated. If
these queries are pre-computed and the results stored in
the data warehouse as a materialized view, using
materialized views significantly improves performance
by providing fast lookups into the set of results.
A Materialized View generally behaves like a Index and it
can also have any Number of Aggregates and Joins.
| Is This Answer Correct ? | 37 Yes | 6 No |
Answer / papa
Materialized View caches the data,but view cannt store the
data all.
| Is This Answer Correct ? | 27 Yes | 11 No |
Answer / navas
View:It is a sql query which is executed and populates
results each time when the particular view is accessed.When
we make a DML statement in view it will affect the original
data available in datebase table.
Materialized view:Materialized view is similar to a table
that exists in the table space.The resultsets are fetched
and populated in materialized view from various table when
a meterialixed view is created and will be availabe until
the view is refreshed.
| Is This Answer Correct ? | 18 Yes | 5 No |
Answer / roshan
apart from all the above answer one more difference is:
suppose we delete a table then all the views becomes invalid but this is not the case with the materialized view. its most interesting feature is auto commit refresh...
| Is This Answer Correct ? | 13 Yes | 3 No |
Answer / surajit n bhowmick
A View is just a stored query and has no physical role.
Once a view is instantiated, performance can be quite good,
until it is aged out of the cache.
A materialized view has a physical table associated with
it, it does not have to resolve the query each time it is
queried. Depending on how large the result and how complex
the query, a materialized view should perform better.
| Is This Answer Correct ? | 12 Yes | 4 No |
Answer / manohara reddy
view is logic and virtual table. it does't hold data.it
allows DML Operations.when ever u update or insert in base
table or view automatically changed those.
materialized view is static. u want create m.view DBA
Privileges and permissions must. it hold data all. when ever
u update or create rows in base table , it update only
update base table. doesn't change.
| Is This Answer Correct ? | 5 Yes | 7 No |
Answer / tiklu
Materialized Views are used by men with Tiny Penis
Where are Views are for Women with loose Vagina
| Is This Answer Correct ? | 1 Yes | 14 No |
Answer / the tiklu
Materialized View is for Consumerist es, while Views
are for great men and sexy women.
| Is This Answer Correct ? | 7 Yes | 46 No |
hi all when i am creating repository contents i am getting this error and not able to create contents please let me know wht may be the problem ORA-01031: insufficient privileges Database driver error... Function Name : executeDirect SQL Stmt : CREATE VIEW REP_DATABASE_DEFS AS SELECT DISTINCT DBDNAM DATABASE_NAME, SRCNAM DEF_SOURCE, SUBJ_NAME SUBJECT_AREA, NULL VERSION_ID, OPB_DBD.VERSION_NUMBER DATABASE_VERSION_NUMBER FROM OPB_DBD, OPB_SUBJECT, OPB_SRC WHERE OPB_DBD.SUBJ_ID = OPB_SUBJECT.SUBJ_ID AND OPB_SRC.DBDID = OPB_DBD.DBDID AND OPB_SRC.VERSION_NUMBER = OPB_DBD.VERSION_NUMBER AND OPB_SRC.IS_VISIBLE = 1 Oracle Fatal Error Database driver error... Function Name : ExecuteDirect Oracle Fatal Error Error occurred while creating the repository An error has occurred while creating contents. Dropping repository tables... Create Contents operation on repository [reposerv] ended at 01/02/2009 13:02:48. Elapsed time is 0:00:09.
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