Moves internal row pointer (PHP 3, PHP 4, PHP 5)
bool mssql_data_seek ( resource result_identifier, int row_number )

如果成功则返回 TRUE,失败则返回 FALSE

mssql_data_seek() moves the internal row pointer of the MS SQL result associated with the specified result identifier to point to the specified row number, first row being number 0. The next call to mssql_fetch_row() would return that row.