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I’m trying to figure out how big a certain database would be (it hasn’t been created yet). I know how many rows and what the tables will be. Is there a feature in Oracle that will tell me the size of such a theoretical database? Is there a known math formula I can use? I know there is a feature to determine the size of an existing database, but I want to know how big it will be before I create it.
you can from the size of the data types for the columns in a table. You can then get a rough estimate of the size of a row in that table. then for 1 to n tables, then for 1 row in 1 table for x rows in x tables = estimate of the database for a given rowsize.
Long handed I know but this is how i normally do this.