I downloaded a MySQL backup file and promptly imported into MAMP's phpMyAdmin. I got this return:

Error
SQL query: 

--
-- Database: `mysql`
--
-- --------------------------------------------------------
--
-- Table structure for table `columns_priv`
--
CREATE TABLE IF NOT EXISTS  `columns_priv` (

 `Host` CHAR( 60 ) COLLATE utf8_bin NOT NULL DEFAULT  '', 
 `Db` CHAR( 64 ) COLLATE utf8_bin NOT NULL DEFAULT  '',
 `User` CHAR( 16 ) COLLATE utf8_bin NOT NULL DEFAULT  '',
 `Table_name` CHAR( 64 ) COLLATE utf8_bin NOT NULL DEFAULT  '',
 `Column_name` CHAR( 64 ) COLLATE utf8_bin NOT NULL DEFAULT  '',
 `Timestamp` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP ,
 `Column_priv` SET(  'Select',  'Insert',  'Update',  'References' ) CHARACTER SET utf8          NOT NULL DEFAULT  '',
PRIMARY KEY (  `Host` ,  `Db` ,  `User` ,  `Table_name` ,  `Column_name` )
) ENGINE = MYISAM DEFAULT CHARSET = utf8 COLLATE = utf8_bin COMMENT =  'Column      privileges';

MySQL said: 

#1046 - No database selected 

I did not alter the .sql file at all. Any hints on how i can get this puppy going locally?

Thanks!