List all default constraints in Azure SQL Database

Article for: SQL Server MySQL MariaDB

The query below lists the default constraints defined in the database, ordered by constraint name.

Check this query to see them organized by table.

Query

select con.[name] as constraint_name,
    schema_name(t.schema_id) + '.' + t.[name]  as [table],
    col.[name] as column_name,
    con.[definition]
from sys.default_constraints as con
    left outer join sys.objects as t
        on con.parent_object_id = t.object_id
    left outer join sys.all_columns as col
        on con.parent_column_id = col.column_id
        and con.parent_object_id = col.object_id
order by con.name

Columns

  • constraint_name - name of the constraint in the database
  • table - schema and table name for which the constraint is defined
  • column_name - name of the column
  • definition - SQL expression that defines this default constraint

Rows

  • One row: represents one default constraint
  • Scope of rows: the query returns all default constraints in the database (all columns with default constraints)
  • Ordered by constraint name

Sample results

List of default constraints in the AdventureWorksLT database.

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