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# mssql_select_db

(PHP 3, PHP 4, PHP 5)

mssql_select_db -- Select MS SQL database

## 说明

bool mssql_select_db ( string database_name [, resource link_identifier] )

mssql_select_db() sets the current active database on the server that's associated with the specified link identifier.

Every subsequent call to mssql_query() will be made on the active database.

## 参数

`database_name`

  The database name.

  To escape the name of a database that contains spaces, hyphens ("-"), or any other exceptional characters, the database name must be enclosed in brackets, as is shown in the example, below. This technique must also be applied when selecting a database name that is also a reserved word (such as `primary`).

`link_identifier`

  A MS SQL link identifier, returned by mssql_connect() or mssql_pconnect().

  If no link identifier is specified, the last opened link is assumed. If no link is open, the function will try to establish a link as if mssql_connect() was called, and use it.

## 返回值

如果成功则返回 `TRUE`，失败则返回 `FALSE`。

## 范例

例 1. mssql_select_db() example

`<?php $conn = mssql_connect('MYSQLSERVER', 'sa', 'password'); mssql_select_db('[my data-base]', $conn); ?>`

## 参见

mssql_connect()
mssql_pconnect()
mssql_query()

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