[ @objname =] 'name'

Is the name of any object, in sysobjects or any user-defined data type in the systypes table. name is nvarchar(776), with a default of NULL. Database names are not acceptable.

0 (success) or 1 (failure)

The result sets that are returned depend on whether name is specified, when it is specified, and what database object it is.

1. If sp_help is executed with no arguments, summary information of objects of all types that exist in the current database is returned.
   

   Column name	Data type	Description
   Name	nvarchar(128)	Object name
   Owner	nvarchar(128)	Object owner
   Object_type	nvarchar(31)	Object type

2. If name is a SQL Server data type or user-defined data type, sp_help returns this result set.
   

   Column name	Data type	Description
   Type_name	nvarchar(128)	Data type name.
   Storage_type	nvarchar(128)	SQL Server type name.
   Length	smallint	Physical length of the data type (in bytes).
   Prec	int	Precision (total number of digits).
   Scale	int	Number of digits to the right of the decimal.
   Nullable	varchar(35)	Indicates whether NULL values are allowed: Yes or No.
   Default_name	nvarchar(128)	Name of a default bound to this type. NULL = No default is bound.
   Rule_name	nvarchar(128)	Name of a rule bound to this type. NULL = No default is bound.
   Collation	sysname	Collation of the data type. NULL for non-character data types.

3. If name is any database object other than a data type, sp_help returns this result set and also additional result sets, based on the type of object specified.
   

   Column name	Data type	Description
   Name	nvarchar(128)	Table name
   Owner	nvarchar(128)	Table owner
   Type	nvarchar(31)	Table type
   Created_datetime	datetime	Date table created

   Depending on the database object specified, sp_help returns additional result sets.
   If name is a system table, user table, or view, sp_help returns the following result sets. However, the result set that describes where the data file is located on a file group is not returned for a view.
   
   • Additional result set returned on column objects:
     

     Column name	Data type	Description
     Column_name	nvarchar(128)	Column name.
     Type	nvarchar(128)	Column data type.
     Computed	varchar(35)	Indicates whether the values in the column are computed: Yes or No.
     Length	int	Column length in bytes. Note: If the column data type is a large value type (varchar(max), nvarchar(max), varbinary(max), or xml), the value will display as -1.
     Prec	char(5)	Column precision.
     Scale	char(5)	Column scale.
     Nullable	varchar(35)	Indicates whether NULL values are allowed in the column: Yes or No.
     TrimTrailingBlanks	varchar(35)	Trim the trailing blanks. Returns Yes or No.
     FixedLenNullInSource	varchar(35)	For backward compatibility only.
     Collation	sysname	Collation of the column. NULL for noncharacter data types.

   • Additional result set returned on identity columns:
     

     Column name	Data type	Description
     Identity	nvarchar(128)	Column name whose data type is declared as identity.
     Seed	numeric	Starting value for the identity column.
     Increment	numeric	Increment to use for values in this column.
     Not For Replication	int	IDENTITY property is not enforced when a replication login, such as sqlrepl, inserts data into the table: 1 = True 0 = False

   • Additional result set returned on columns:
     

     Column name	Data type	Description
     RowGuidCol	sysname	Name of the global unique identifier column.

   • Additional result set returned on filegroups:
     

     Column name	Data type	Description
     Data_located_on_filegroup	nvarchar(128)	Filegroup in which the data is located: Primary, Secondary, or Transaction Log.

   • Additional result set returned on indexes:
     

     Column name	Data type	Description
     index_name	sysname	Index name.
     Index_description	varchar(210)	Description of the index.
     index_keys	nvarchar(2078)	Column names on which the index is built.

   • Additional result set returned on constraints:
     

     Column name	Data type	Description
     constraint_type	nvarchar(146)	Type of constraint.
     constraint_name	nvarchar(128)	Name of the constraint.
     delete_action	nvarchar(9)	Indicates whether the DELETE action is: No Action, CASCADE, or N/A. Only applicable to FOREIGN KEY constraints.
     update_action	nvarchar(9)	Indicates whether the UPDATE action is: No Action, Cascade, or N/A. Only applicable to FOREIGN KEY constraints.
     status_enabled	varchar(8)	Indicates whether the constraint is enabled: Enabled, Disabled, or N/A. Only applicable to CHECK and FOREIGN KEY constraints.
     status_for_replication	varchar(19)	Indicates whether the constraint is for replication. Only applicable to CHECK and FOREIGN KEY constraints.
     constraint_keys	nvarchar(2078)	Names of the columns that make up the constraint or, in the case for defaults and rules, the text that defines the default or rule.

   • Additional result set returned on referencing objects:
     

     Column name	Data type	Description
     Table is referenced by	nvarchar(516)	Identifies other database objects that reference the table.

   • Additional result set returned on stored procedures, functions, or extended stored procedures.
     

     Column name	Data type	Description
     Parameter_name	nvarchar(128)	Stored procedure parameter name.
     Type	nvarchar(128)	Data type of the stored procedure parameter.
     Length	smallint	Maximum physical storage length, in bytes.
     Prec	int	Precision or total number of digits.
     Scale	int	Number of digits to the right of the decimal point.
     Param_order	smallint	Order of the parameter.

The sp_help procedure looks for an object in the current database only.

When name is not specified, sp_help lists object names, owners, and object types for all objects in the current database. sp_helptrigger provides information about triggers.

sp_help exposes only orderable index columns; therefore, it does not expose information about XML indexes or spatial indexes.

Requires membership in the public role. The user must have at least one permission on objname. To view column constraint keys, defaults, or rules, you must have VIEW DEFINITION permission on the table.

A. Returning information about all objects

USE master;
GO
EXEC sp_help;
GO

B. Returning information about a single object

USE AdventureWorks;
GO
EXEC sp_help 'Person.Contact';
GO

Reference

Help and Information