Here i have an usable code for all u:
I wanted to know if a field is nullable or if it's defined as a primary key, here are those functions definitions:
*Aditional Notes:
if any of the tables are replicated in another database exactly , this code will not work well.
//-----to know if a field is nullable-------
function mssql_field_nullable($ip,$user,$pass,$table,$field)//starting from 1st field
{
$conn=mssql_connect($ip,$user,$pass)or die;
mssql_select_db('master');
$result=mssql_query("SELECT syscolumns.isnullable
FROM sysobjects INNER JOIN
syscolumns ON sysobjects.id = syscolumns.id WHERE sysobjects.name ='$table' AND syscolumns.isnullable = 1");
$x=mssql_num_rows($result);
mssql_close($conn);
return ($x==1?1:0);
}
//-------to know if a field is a primary key-------
function mssql_field_key($ip,$user,$pass,$table,$field)//starting from 1st field
{
$conn=mssql_connect($ip,$user,$pass)or die;
mssql_select_db('master');
$result=mssql_query("SELECT sysindexkeys.colid FROM sysobjects INNER JOIN sysindexkeys ON sysobjects.id = sysindexkeys.id WHERE sysobjects.name ='$table' AND sysindexkeys.colid = $field");
$x=mssql_num_rows($result);
mssql_close($conn);
return ($x==1?1:0);
}
by R.M.R.A
mssql_field_type
(PHP 4, PHP 5, PECL odbtp >= 1.1.1)
mssql_field_type — Devuelve el tipo de un campo
Advertencia
Esta función está OBSOLETA en PHP 7.0.0.
Las alternativas a esta función son:
Descripción
mssql_field_type
( resource
$result
[, int $offset = -1
] ) : string
Devuelve el tipo del campo número offset dentro del resultado
result.
Parámetros
-
result -
El resultado que está siendo evaluado. Este resultado proviene de una llamada a la función mssql_query().
-
offset -
La posición del campo, empezando por 0. Si se omite, se utilizará el campo actual.
Valores devueltos
El tipo del campo especificado por el índice en caso de éxito o FALSE en caso de error.
Ejemplos
Ejemplo #1 mssql_field_type() example
<?php
// Conectar a MSSQL y seleccionar la base de datos
mssql_connect('MANGO\SQLEXPRESS', 'sa', 'phpfi');
mssql_select_db('php');
// Enviar una consulta a MSSQL
$query = mssql_query('SELECT [name] FROM [php].[dbo].[persons]');
// Mostrar el tipo y longitud del campo
echo '\'' . mssql_field_name($query, 0) . '\' es del tipo ' .
strtoupper(mssql_field_type($query, 0)) .
'(' . mssql_field_length($query, 0) . ')';
// Liberar el recurso
mssql_free_result($query);
?>
El resultado del ejemplo sería algo similar a:
'name' es del tipo CHAR(50)
Ver también
- mssql_field_length() - Devuelve la longitud de un campo
- mssql_field_name() - Devuelve el nombre de un campo
add a note
User Contributed Notes 3 notes
rmorales at protel dot net dot mx ¶
21 years ago
huib at bestia dot com ¶
19 years ago
If you need a more detailed discription of your column type,
This query shows your true datatypes like:
binary => binary
varbinary => varbinary
varchar => varchar
bit => bit
char => char
datetime => datetime
smalldatetime => smalldatetime
decimal => decimal
real => real
float => float
tinyint => tinyint
smallint => smallint
smallmoney => smallmoney
money => money
nchar => nchar
ntext => ntext
text => text
numeric => numeric
nvarchar => nvarchar
SELECT sysobjects.name AS tableName, syscolumns.name AS columnName, systypes.name AS columnType
FROM sysobjects INNER JOIN
syscolumns ON sysobjects.id = syscolumns.id INNER JOIN
systypes ON syscolumns.type = systypes.type AND syscolumns.xusertype = systypes.xusertype
nicholas at silverorange dot com ¶
19 years ago
The matching returned values for each of the common datatypes are:
binary => blob
varbinary => blob
varchar => char
bit => bit
char => char
datetime => datetime
smalldatetime => datetime
decimal => real
real => real
float => real
tinyint => int
smallint => int
smallmoney => money
money => money
nchar => char
ntext => text
text => text
numeric => numeric
nvarchar => char
