SQL query to find Primary Key of a table?

Question

How can I find which column is the primary key of a table by using a query?

Answer 1

Try this query in SQL server:

SELECT     X.NAME AS INDEXNAME,
           COL_NAME(IC.OBJECT_ID,IC.COLUMN_ID) AS COLUMNNAME
FROM       SYS.INDEXES  X 
INNER JOIN SYS.INDEX_COLUMNS  IC 
        ON X.OBJECT_ID = IC.OBJECT_ID
       AND X.INDEX_ID = IC.INDEX_ID
WHERE      X.IS_PRIMARY_KEY = 1
  AND      OBJECT_NAME(IC.OBJECT_ID)='YOUR_TABLE'