odbc_primarykeys
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_primarykeys — Gets the primary keys for a table
说明
odbc_primarykeys
( resource
$odbc
, string|null $catalog
, string $schema
, string $table
) : resource|falseReturns a result identifier that can be used to fetch the column names that comprise the primary key for a table.
参数
-
odbc
-
ODBC 连接标识符,详见 odbc_connect()。
-
catalog
-
The catalog ('qualifier' in ODBC 2 parlance).
-
schema
-
The schema ('owner' in ODBC 2 parlance).
-
table
-
返回值
Returns an ODBC result identifier 或者在失败时返回 false
.
The result set has the following columns:
TABLE_CAT
TABLE_SCHEM
TABLE_NAME
COLUMN_NAME
KEY_SEQ
PK_NAME
The result set is ordered by TABLE_CAT
, TABLE_SCHEM
,
TABLE_NAME
and KEY_SEQ
.
范例
示例 #1 List primary Keys of a Column
<?php
$conn = odbc_connect($dsn, $user, $pass);
$primarykeys = odbc_primarykeys($conn, 'TutorialDB', 'dbo', 'TEST');
while (($row = odbc_fetch_array($primarykeys))) {
print_r($row);
break; // further rows omitted for brevity
}
?>
以上例程的输出类似于:
Array ( [TABLE_CAT] => TutorialDB [TABLE_SCHEM] => dbo [TABLE_NAME] => TEST [COLUMN_NAME] => id [KEY_SEQ] => 1 [PK_NAME] => PK__TEST__3213E83FE141F843 )
参见
- odbc_tables() - Get the list of table names stored in a specific data source
- odbc_foreignkeys() - Retrieves a list of foreign keys