odbc_primarykeys
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_primarykeys — Gets the primary keys for a table
說明
odbc_primarykeys(
resource
?string
string
string
): resource|false
resource
$odbc,?string
$catalog,string
$schema,string
$table): resource|false
Returns a result identifier that can be used to fetch the column names that comprise the primary key for a table.
參數
-
odbc -
ODBC 連線識別符號，詳見 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 或者在失敗時返回 false.
The result set has the following columns:
TABLE_CATTABLE_SCHEMTABLE_NAMECOLUMN_NAMEKEY_SEQPK_NAME
The result set is ordered by TABLE_CAT, TABLE_SCHEM,
TABLE_NAME and KEY_SEQ.
範例
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
}
?>
以上例程的輸出類似於：
Array
(
[TABLE_CAT] => TutorialDB
[TABLE_SCHEM] => dbo
[TABLE_NAME] => TEST
[COLUMN_NAME] => id
[KEY_SEQ] => 1
[PK_NAME] => PK__TEST__3213E83FE141F843
)
參見
- odbc_tables() - Get the list of table names stored in a specific data source
- odbc_foreignkeys() - Retrieves a list of foreign keys