How do i count number of table being used in a view

Question

Hi All,
I will be really thankful if anyone please let me know about the count of number of tables being used in a view. I am using Oracle 10g Release 2 on HP-UX(11.31).
In actual I have to find views in my database with more than 5 table in join.
Thank you
Gursimran

Answer 1

Try :
select count(*) from dba_dependencies
where name ='<view name>'
and owner = '<view owner>'
and referenced_type= 'TABLE';Example:
SQL> select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> show user;
USER is "HR"
SQL>
SQL> drop table t1 purge;
Table dropped.
SQL> drop table t2 purge;
Table dropped.
SQL> drop table t3 purge;
Table dropped.
SQL> drop view v;
View dropped.
SQL>
SQL> create table t1(x int);
Table created.
SQL> create table t2(y int);
Table created.
SQL> create table t3(z int);
Table created.
SQL> create view v as select x,y,z from t1,t2,t3;
View created.
SQL>
SQL> connect / as sysdba
ConnectÚ.
SQL> alter session set nls_language=english;
Session altered.
SQL>
SQL> select count(*) from dba_dependencies
  2  where name ='V'
  3  and owner = 'HR'
  4  and referenced_type= 'TABLE';
  COUNT(*)
         3
SQL>Edited by: P. Forstmann on 26 juil. 2010 17:45