Scan table for columns with all unqiue rows

Question

this is the best I could do think of so far which doesnt work, I dont know how to convert the literal column name to a reference to the column
SELECT g.table_name, g.column_name
FROM all_tab_columns g
WHERE g.table_name = 'SA_AREA' and NOT EXISTS (
SELECT g2.column_name
FROM all_tab_columns g2
WHERE 1 !=
(SELECT COUNT (*)
FROM all_tab_columns g3
--i know this part is wrong for sure
WHERE g2.column_name = g3.column_name
AND g2.table_name = g3.table_name
AND g.column_name = g2.column_name
AND g.table_name = g2.table_name))
thanks for your help

Answer 1

Hello nwill,
I think that .. you want something like this
create table TEST_(COL1 VARCHAR2(30) not null,
                   COL2 NUMBER,
                   COL3 VARCHAR2(10));
alter table TEST_ add constraint PK_COL1 primary key (COL1);
alter table TEST_ add constraint UK_COL3 unique (COL3);
SELECT TABLE_NAME
     , COLUMN_NAME
  FROM ALL_CONS_COLUMNS
WHERE CONSTRAINT_NAME IN
       (SELECT CONSTRAINT_NAME
          FROM ALL_CONSTRAINTS
         WHERE CONSTRAINT_TYPE IN ('P', 'U')) -- (P) primary key and (U) unique
   AND TABLE_NAME IN (SELECT TABLE_NAME
                        FROM ALL_ALL_TABLES
                       WHERE OWNER = 'SCOTT')ouput
TABLE_NAME                     COLUMN_NAME
TEST_                          COL3
TEST_                          COL1Hope this helps
Christian Balz