How do I calculate the number of columns in a table without using the "DESCRIBE tablename"? For this one, you can...
use one of the catalog views, ALL_TAB_COLUMNS. Each row in this view represents a column of a table or view to which you have rights. To illustrate, we'll create a dummy table, and then select a count from the ALL_TAB_COLUMNS view.
create table "ATE"."DUMMY_TABLE" ( dummycol1 numeric(10), dummycol2 varchar(4), dummycol3 date ); select count(*) from all_tab_columns where owner = 'ATE' and table_name = 'DUMMY_TABLE';
Here is the result of the query.
COUNT(*) ---------- 3
Dig Deeper on Oracle and SQL
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.