How can I calculate disk space/DB space and storage spaces.

Hi all,
How can I calculate space clauses and memory related parameters for tables and table spaces? Updation is not allowed in these tables.
I have to create a database also.
I expect a reply with examples.
[email protected]
[email protected]
Thanks for all replies .

Boby,
The formula to estimate the storage parameters for tables and indexes are the following:
Table size = db block size * (# of Estimated rows in 12 months * average row length)/(db block size-90) *(1-PCTFREE/100)
Let assume that you want to create a table called Jose_tab,
db block size = 4092
Estimated row length in 12 months = 1000
Average row len = 100
PCTFREE(Updation is not allowed) = 0
Then, your INITIAL storage parameter will be estimated as follows:
4092*1000*100
(4092-90)*(1-0/100)
= About 10M
Your create table command will look like this,
CREATE TABLE jose_tab
(col1 VARCHAR2(10), col2 NUMBER(2),
....coln VARCHAR2(100))
STORAGE(INITIAL 10M NEXT 10M
PCTINCREASE 0)
PCTFREE 0 PCTUSED 80
TABLESPACE tablespace_name;
Storage parameters for tablespace depends on the amount of disk space available. You can ignore tablespace storage parameters since the size of the tablespace is determined by the size(s) of the data files. Refer to the DBA manual for details.
John

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