How to query for a primary key in oracle 11g

问题

Does anybody know how to query for a primary key of a table in Oracle 11g? I saw a similar question for SQL Server, but I've had no luck from trying the answers on that thread.

Thanks!

回答1:

As the user that owns the table you can do:

select constraint_name, status, deferrable, deferred, validated, generated 
from user_constraints 
where constraint_type = 'P' and table_name = 'Table Name'

Update: I think this gets you what you need.

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = 'Table Name'
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position

You can check this site for more details.

回答2:

select cols.table_name ||' - '||cols.column_name primary_key fromall_constraints cons, all_cons_columns cols,
user_tables ut
where  cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner`enter code here`
and cols.table_name = ut.table_name
order by cols.table_name;

来源：https://stackoverflow.com/questions/5353522/how-to-query-for-a-primary-key-in-oracle-11g