Tipos de recursos
Mssql Functions
Mssql
PHP Manual

# Constantes predefinidas

Estas constantes están definidas por esta extensión y estarán disponibles solamente cuando la extensión ha sido o bien compilada dentro de PHP o grabada dinámicamente en tiempo de ejecución.

`MSSQL_ASSOC` (integer)
  Return an associative array. Used on mssql_fetch_array()'s result_type parameter.
`MSSQL_NUM` (integer)
  Return an array with numeric keys. Used on mssql_fetch_array()'s result_type parameter.
`MSSQL_BOTH` (integer)
  Return an array with both numeric keys and keys with their field name. This is the default value for mssql_fetch_array()'s result_type parameter.
`SQLTEXT` (integer)
  Indicates the 'TEXT' type in MSSQL, used by mssql_bind()'s type parameter.
`SQLVARCHAR` (integer)
  Indicates the 'VARCHAR' type in MSSQL, used by mssql_bind()'s type parameter.
`SQLCHAR` (integer)
  Indicates the 'CHAR' type in MSSQL, used by mssql_bind()'s type parameter.
`SQLINT1` (integer)
  Represents one byte, with a range of -128 to 127.
`SQLINT2` (integer)
  Represents two bytes, with a range of -32768 to 32767.
`SQLINT4` (integer)
  Represents four bytes, with a range if -2147483648 to 2147483647.
`SQLBIT` (integer)
  Indicates the 'BIT' type in MSSQL, used by mssql_bind()'s type parameter.
`SQLFLT4` (integer)
  Represents an four byte float.
`SQLFLT8` (integer)
  Represents an eight byte float.

Tipos de recursos
Mssql Functions
Mssql
PHP Manual