Relation among tables...!!!urgent

Question

Hi all,
I just want to know how to relate a too many tables like 200+ in an organisation for an application database , its difficult for me too trace every constraint,column or how it related eachother to know
pls help me
convey any ideas to me .....

Answer 1

Do you like that?
SELECT F.TABLE_NAME,
  F.CONSTRAINT_NAME,
  F.R_CONSTRAINT_NAME,
  P.TABLE_NAME P_TABLE_NAME
FROM
  (SELECT * FROM USER_CONSTRAINTS
   WHERE CONSTRAINT_TYPE = 'R') F,
  (SELECT * FROM USER_CONSTRAINTS
   WHERE CONSTRAINT_TYPE = 'P') P
WHERE F.R_CONSTRAINT_NAME = P.CONSTRAINT_NAMEor
SELECT F.TABLE_NAME,
  F.CONSTRAINT_NAME,
  F.R_CONSTRAINT_NAME,
  P.TABLE_NAME P_TABLE_NAME
  , P.COLUMN_NAME
FROM
  (SELECT uc.table_name, UC.CONSTRAINT_NAME,UC.R_CONSTRAINT_NAME
     FROM USER_CONSTRAINTS UC
   WHERE UC.CONSTRAINT_TYPE = 'R') F,
  (SELECT uc.table_name, UC.CONSTRAINT_NAME,UC.R_CONSTRAINT_NAME, UCC.COLUMN_NAME
     FROM USER_CONSTRAINTS UC, USER_CONS_COLUMNS UCC
   WHERE UC.CONSTRAINT_TYPE = 'P'
     AND UCC.CONSTRAINT_NAME=UC.CONSTRAINT_NAME) P    
WHERE F.R_CONSTRAINT_NAME = P.CONSTRAINT_NAME;Edited by: Mahir M. Quluzade on Feb 25, 2011 4:23 PM