Php/docs/function.odbc-primarykeys

• PHP Manual
• ODBC 函数
• Gets the primary keys for a table

odbc_primarykeys

(PHP 4, PHP 5, PHP 7)

odbc_primarykeys — Gets the primary keys for a table

说明

odbc_primarykeys ( resource $connection_id , 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.

参数

connection_id

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

Drivers can report additional columns. The result set is ordered by TABLE_CAT, TABLE_SCHEM, TABLE_NAME and KEY_SEQ.

范例

Example #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