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What is an MDDB? What is the difference between MDDBs and
RDBMSs?
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Answer / lok
in mddb we can analyze the data in multiple ways,here we
can create power cubes.
but in rdbm we can create cross tab reports,simple list
reports.
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / sri ram
MDDB stands for Multi Dimensional Database
MDDB: In MDDB, it views data in mutidimensional
(Perspective)i.e.,through various dimensions at a time with
the help of cubes developed using dimensions and stores
data in multidimensional i.e., stores data in power cubes.
In power cubes, each axis is a dimension and each member of
dimension is column.
In MDDB, at a glance we can see the dimensions and data
present in the dimensions
RDDB: In RDDB, it views data in two dimensional and stores
data in two dimensional i.e., in rows and columns in a
table .
In RDDB, we can just see the rows and columns, but only
after issuing select over that u can see the data.
Storage wise:
suppose I have 3 dimensions and 9 rows of data then
in MDDB: takes 9 cells to store the data
in RDDB: takes 27 cells to store the data
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / pradeeshkumar
RDBMS-Relational database management systems.
It involves managing the information that are stored in
relational tables(tables that are related with each other
using a primary and foreign key relationship).
It's not multidimensional. Its just information stored in
tables.
MDDB- Multidimensional Database comes into play at the time
of OnLine Analytical Processing. It stores information
along multidimensions(mostly in multi-d cubes) that
facilitates slicing and dicing.
| Is This Answer Correct ? | 3 Yes | 2 No |
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