Use
select * from user_constraints where table_name=upper('tablenam
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Question
How to view check constraint properties on column
I have an existing database that was created by someone else. I want to view the check constraint properties of a couple of columns. How can I do this via command?
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Answers
if you have a referential constraint, meaning a particular column in a table
is referring to a primay key column in some other table. For example, EMP table
has a column deptno with a referential constraint referring to deptno column in
DEPT table which is a primary key.
select *
from dba_constraints
where owner ='SCOTT'
and table_name ='EMP'; --> take the r_constraint_name column value from the
--> output of this query and put it in the below query
--> to see to which table column it is referring to.
select *
from dba_constraints
where owner ='SCOTT'
and constraint_name ='FK_DEPT_CONS' ; --> you can find all other details except
--> column name of the the referential constraint.
select *
from dba_cons_columns
where constraint_name = 'PK_LOPV' ; --> you can find the column name
--> of the referential constraint
Also the constraint type will be 'R' for foreign key constraints, 'P' for
primary key constraint, 'C' for check constraints.
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by: sujith80Posted on 2008-11-14 at 08:08:20ID: 22960799
You can make use of the views
dba_constraints
dba_cons_columns
If you dont have privileges you may use all_constraints and all_cons_columns
The query will look like
select *
from dba_cons_columns
where table_name = upper('<your table name>') and column_name = upper('<your column name>')