Get a List of all Primary Keys in a Database

Question

Is this the best way to - Get a List of all Primary Keys in a Database - or is there something better?

SELECT
KCU.TABLE_NAME AS Table_Name,
KCU.CONSTRAINT_NAME AS Constraint_Name,
KCU.COLUMN_NAME AS COLUMN_NAME
FROM
INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU
ON KCU.CONSTRAINT_SCHEMA = TC.CONSTRAINT_SCHEMA
AND KCU.CONSTRAINT_NAME = TC.CONSTRAINT_NAME
AND KCU.TABLE_SCHEMA = TC.TABLE_SCHEMA
AND KCU.TABLE_NAME = TC.TABLE_NAME
WHERE
TC.CONSTRAINT_TYPE = 'PRIMARY KEY'
ORDER BY
KCU.TABLE_SCHEMA, KCU.TABLE_NAME, KCU.CONSTRAINT_NAME

Answer 1

USE databasename; 

GO

SELECT i.name AS IndexName, OBJECT_NAME(ic.OBJECT_ID) AS TableName, 
       COL_NAME(ic.OBJECT_ID,ic.column_id) AS ColumnName
FROM sys.indexes AS i
INNER JOIN sys.index_columns AS ic
ON i.OBJECT_ID = ic.OBJECT_ID
AND i.index_id = ic.index_id
WHERE i.is_primary_key = 1

This query will extract the all primary key constraints from the database... u just need to execute this query and type the database name in first line

Answer 2

The following syntax give you all constraints in database in use.

select * from sys.key_constraints;