Join user_constraints and user_cons_columns to get the column_name, constraint_name, constraint_type, and status : all_cons_columns « System Tables Data Dictionary « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » System Tables Data Dictionary » all_cons_columns 
30. 4. 2. Join user_constraints and user_cons_columns to get the column_name, constraint_name, constraint_type, and status
SQL>
SQL>
SQL> -- create demo table
SQL> create table myTable(
  2    id           NUMBER(2),
  3    value        NUMBER(6,2)
  4  )
  5  /

Table created.

SQL>
SQL> -- prepare data
SQL> insert into myTable(ID,  value)values (1,9)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (2,2.11)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (3,3.44)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (4,-4.21)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (5,10)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (6,3)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (7,-5.88)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (8,123.45)
  2  /

row created.

SQL> insert into myTable(ID,  value)values (9,98.23)
  2  /

row created.

SQL>
SQL> select from myTable
  2  /

        ID      VALUE
---------- ----------
         1          9
         2       2.11
         3       3.44
         4      -4.21
         5         10
         6          3
         7      -5.88
         8     123.45
         9      98.23

rows selected.

SQL>
SQL>
SQL>
SQL> ALTER TABLE myTable
  2  ADD CONSTRAINT uq UNIQUE (id)
  3  DEFERRABLE INITIALLY DEFERRED;

Table altered.

SQL>
SQL>
SQL> SELECT ucc.column_name, ucc.constraint_name, uc.constraint_type, uc.status
  2  FROM user_constraints uc, user_cons_columns ucc
  3  WHERE uc.table_name = ucc.table_name
  4  AND uc.constraint_name = ucc.constraint_name
  5  AND ucc.table_name = 'MYTABLE';

COLUMN_NAME          CONSTRAINT_NAME                C STATUS
------------------------------ - --------
ID                   UQ                             U ENABLED


SQL>
SQL>
SQL> -- clean the table
SQL> drop table myTable
  2  /

Table dropped.

SQL>
SQL>
SQL>
30. 4. all_cons_columns
30. 4. 1. Get information on all the column constraints you have access to using all_cons_columns.
30. 4. 2. Join user_constraints and user_cons_columns to get the column_name, constraint_name, constraint_type, and status
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