Query below lists all primary keys constraints (PK) in the database with their columns (one row per column).

See also: list of all primary keys (one row per PK).

Query

select schema_name(tab.schema_id) as [schema_name], 
    pk.[name] as pk_name,
    ic.index_column_id as column_id,
    col.[name] as column_name, 
    tab.[name] as table_name
from sys.tables tab
    inner join sys.indexes pk
        on tab.object_id = pk.object_id 
        and pk.is_primary_key = 1
    inner join sys.index_columns ic
        on ic.object_id = pk.object_id
        and ic.index_id = pk.index_id
    inner join sys.columns col
        on pk.object_id = col.object_id
        and col.column_id = ic.column_id
order by schema_name(tab.schema_id),
    pk.[name],
    ic.index_column_id

Columns

• schema_name - PK schema name
• pk_name - PK constraint name
• column_id - id of column in index (1, 2, ...). 2 or higher means key is composite (contains more than one column)
• column_name - primary key column name
• table_name - PK table name

Rows

• One row represents one primary key column
• Scope of rows: columns of all PK constraints in a database
• Ordered by schema, PK constraint name, column id

Sample results

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