Data Partitioning in Database

Question

Hi All,
I have little bit confuse in data partitioning in database, I have read about it and i understand that there ate two type called vertical partitioning and another horizontal partitioning...
I have three questions are
1- is data partitioning used of in networks or can be in one PC?
2- the data partitioning divided data that in table to partitions (groups) , according what ??? is to quantity or meaning of data that inside table?
3- Is clustering that can be execute by Oracle using CTX_CLS.CLUSTERING type of it or partitioning not related to it?
Please let any one give short answer about it.
regards
Dheya

Answer 1

973907 wrote:
I have little bit confuse in data partitioning in database, I have read about it and i understand that there ate two type called vertical partitioning and another horizontal partitioning...These are basic partitioning concepts. Vertical means taking something like a single 100 column row table, and splitting it up into 10 partitions/tables with 10 columns each (plus pk of course).
Horizontal partitioning means taking a table like a year's invoices, and splitting that into 365 daily partitions, where each partition contains the invoice rows of for a specific day of the year.
There is also other partitioning concepts like application partitioning, network partitioning (which happens to be a bad thing) and so on.
I have three questions are
1- is data partitioning used of in networks or can be in one PC?Neither. Database partitioning happens inside the database. The database uses different structures for storing data. It used hash tables, index organised tables, B+trees, bitmap indexes and so on. Partitioning is just another type of data structure, used by the database, for storing and managing data.
2- the data partitioning divided data that in table to partitions (groups) , according what ??? is to quantity or meaning of data that inside table?That depends on the type of partitioning used. Oracle supports list, hash and range partitions. Each of these uses a different algorithm to determine what data goes into which partition. Each of these satisfy different partitioning requirements.
3- Is clustering that can be execute by Oracle using CTX_CLS.CLUSTERING type of it or partitioning not related to it?Partitioning is a physical data structure and transparent to the user and application. The user and app see table EMPLOYEES. They do not need to know or understand the physical structure of the table. The table can be a hash table, an index organised table, a hash partitioned table - and the user and app will not even know that. It does not change the way the user and app uses the table, it does not make a difference to their SQL statements on the table.
CTX_CLS is an interface for classifying text data/documents. It uses its own data structures to do that. It calls a collection of related text data, a cluster.
This has nothing to do with the Oracle Partitioning Option feature.