Finding a Primary Key Constraint on the fly in SQL Server 2005

Question

I have the following SQL:

 ALTER TABLE dbo.PS_userVariables DROP CONSTRAINT PK_PS_userVariables;
 ALTER TABLE dbo.PS_userVariables ADD PRIMARY KEY (varnumber         


        

Answer 1

SELECT 
   A.TABLE_NAME, 
   A.CONSTRAINT_NAME, 
   B.COLUMN_NAME
FROM 
   INFORMATION_SCHEMA.TABLE_CONSTRAINTS A, 
   INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE B
WHERE 
      CONSTRAINT_TYPE = 'PRIMARY KEY' 
   AND A.CONSTRAINT_NAME = B.CONSTRAINT_NAME
ORDER BY 
   A.TABLE_NAME 

Ref: Pinal Dave @ http://blog.sqlauthority.com/2008/09/06/sql-server-find-primary-key-using-sql-server-management-studio/